u/Afraid-Bunch6373

Electro Audio World's take :

I've been experimenting with the different performances of hybrid IEMs for a while now. The most interesting ones are the bone conduction driver models. In well tuned and sound engineered IEMs, I really like the color these hybrid drivers add to the sound performance.​

At the heart of this blue BGVP DMA is a sophisticated Triple Hybrid configuration:

1 × 9.2 mm Nickel Nanometer Diaphragm Dynamic Driver

1 × Sonion 2300 Series Balanced Armature

1 × Knowles RAD Series Balanced Armature

2 × Sonion Bone Conduction Drivers

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

On paper, the dual bone conduction feature caught my attention. However, in practice, the real success lies in how subtly it contributes to the overall presentation.

Unlike some bone conduction headphones that artificially enhance perceived detail or create an unnatural sense of space, the DMA has tried to use this technology to improve note density, spatial perception, and low frequency texture.

The result is an IEM that sounds bigger and more immersive than its physical size suggests. After listening from multiple sources for a few weeks, here are my impressions:

Bass

The DMA delivers bass that strikes a perfect balance between authority and control. The 9.2mm nickel diaphragm dynamic driver produces significant sub bass extension while maintaining impressive balance across the entire low frequency range. The sub bass goes deep enough to satisfy even electronic music enthusiasts, but never dominates the overall presentation.

The first thing I noticed here was the texture in the bass. Many IEMs in this category can produce quantity, but relatively few can convincingly reproduce bass textures. This is what gives you pleasure.

The DMA performs remarkably well here. Bass guitars showcase string vibration. Electronic bass lines reveal subtle modulation changes. Large orchestral percussion instruments exhibit convincing body and resonance.

The mid bass effect is powerful and energetic without being bloated. Kick drums carry realistic weight while maintaining clean attack and damping characteristics.

The bone conduction implementation seems to provide an additional physical contribution to the bass notes without over increasing the quantity. This creates a tactile quality that's difficult to describe until experienced firsthand.

Listeners who prioritize quality over quantity will find much to appreciate here. I recommend trying it out somewhere if you have the chance.

Midrange

The mid frequency might be where the DMA stands out most distinctly from many of its competitors. Vocals come across with impressive naturalness and tonal realism. Male vocals, in particular, have excellent body and warmth. Female vocals sound vibrant, expressive, and highly engaging.

The Sonion and Knowles balanced armatures work seamlessly together, providing a spacious presentation without artificially distancing themselves.

There's a lot of detail, but the DMA never sounds clinical. I think achieving that balance is quite difficult. Many technically focused IEMs sacrifice emotional engagement in the pursuit of resolution, you know...

Acoustic instruments are beautifully rendered. Pianos have a convincing harmonic structure. Strings maintain a realistic tone. Piano wind instruments exhibit excellent tonal richness without becoming overly aggressive.

Complex arrangements remain orderly and easy to follow. Even dense orchestral passages maintain instrument separation and layering exceptionally well.

Treble

DMA focuses on creating a smooth and fatigue free listening experience rather than maximizing brightness or excessive high frequency emphasis.

I think it has succeeded in this. I hear a treble response that remains detailed and informative. Cymbals have a realistic metallic character.

High frequency percussion instruments maintain excellent clarity. Harmonics of string instruments sound natural. Most importantly, DMA has managed to prevent sibilance and harshness exceptionally well.

Even aggressive recordings remain enjoyable. Listeners sensitive to treble will probably appreciate this tuning philosophy as much as I do.

There is enough energy to maintain excitement and detail capture, in my opinion, but not enough to create listening fatigue during long sessions. I guess that's what matters. Isn't it?

The only area where some listeners might want more is the ultra high frequency extension.

Compared to some newer IEMs over $500, I would say DMA sacrifices a small amount of ultimate airiness in exchange for smoothness. Personally, I see this as a valuable trade off. Because it's quite successful in terms of price performance ratio.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

Excellent driver integration and impressive overall harmony
Natural and engaging mid frequency delivery
Rich bass with strong texture and physicality
Bone conduction application adds immersion without artificial sound
Wide and three dimensional soundstage
Comfortable ergonomic case design
High quality silver plated OCC cable included
Interchangeable 3.5mm and 4.4mm termination system
Easily driven from almost any source
Smooth and non fatiguing treble adjustment

Cons: 

Treble extension is somewhat limited compared to new flagship competitors
Original cable is good, but the interchangeable socket should have been locked with a screw system. The plug could come loose while on the move.

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's take :

I've been experimenting with the different performances of hybrid IEMs for a while now. The most interesting ones are the bone conduction driver models. In well tuned and sound engineered IEMs, I really like the color these hybrid drivers add to the sound performance.​

At the heart of this blue BGVP DMA is a sophisticated Triple Hybrid configuration:

1 × 9.2 mm Nickel Nanometer Diaphragm Dynamic Driver

1 × Sonion 2300 Series Balanced Armature

1 × Knowles RAD Series Balanced Armature

2 × Sonion Bone Conduction Drivers

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

On paper, the dual bone conduction feature caught my attention. However, in practice, the real success lies in how subtly it contributes to the overall presentation.

Unlike some bone conduction headphones that artificially enhance perceived detail or create an unnatural sense of space, the DMA has tried to use this technology to improve note density, spatial perception, and low frequency texture.

The result is an IEM that sounds bigger and more immersive than its physical size suggests. After listening from multiple sources for a few weeks, here are my impressions:

Bass

The DMA delivers bass that strikes a perfect balance between authority and control. The 9.2mm nickel diaphragm dynamic driver produces significant sub bass extension while maintaining impressive balance across the entire low frequency range. The sub bass goes deep enough to satisfy even electronic music enthusiasts, but never dominates the overall presentation.

The first thing I noticed here was the texture in the bass. Many IEMs in this category can produce quantity, but relatively few can convincingly reproduce bass textures. This is what gives you pleasure.

The DMA performs remarkably well here. Bass guitars showcase string vibration. Electronic bass lines reveal subtle modulation changes. Large orchestral percussion instruments exhibit convincing body and resonance.

The mid bass effect is powerful and energetic without being bloated. Kick drums carry realistic weight while maintaining clean attack and damping characteristics.

The bone conduction implementation seems to provide an additional physical contribution to the bass notes without over increasing the quantity. This creates a tactile quality that's difficult to describe until experienced firsthand.

Listeners who prioritize quality over quantity will find much to appreciate here. I recommend trying it out somewhere if you have the chance.

Midrange

The mid frequency might be where the DMA stands out most distinctly from many of its competitors. Vocals come across with impressive naturalness and tonal realism. Male vocals, in particular, have excellent body and warmth. Female vocals sound vibrant, expressive, and highly engaging.

The Sonion and Knowles balanced armatures work seamlessly together, providing a spacious presentation without artificially distancing themselves.

There's a lot of detail, but the DMA never sounds clinical. I think achieving that balance is quite difficult. Many technically focused IEMs sacrifice emotional engagement in the pursuit of resolution, you know...

Acoustic instruments are beautifully rendered. Pianos have a convincing harmonic structure. Strings maintain a realistic tone. Piano wind instruments exhibit excellent tonal richness without becoming overly aggressive.

Complex arrangements remain orderly and easy to follow. Even dense orchestral passages maintain instrument separation and layering exceptionally well.

Treble

DMA focuses on creating a smooth and fatigue free listening experience rather than maximizing brightness or excessive high frequency emphasis.

I think it has succeeded in this. I hear a treble response that remains detailed and informative. Cymbals have a realistic metallic character.

High frequency percussion instruments maintain excellent clarity. Harmonics of string instruments sound natural. Most importantly, DMA has managed to prevent sibilance and harshness exceptionally well.

Even aggressive recordings remain enjoyable. Listeners sensitive to treble will probably appreciate this tuning philosophy as much as I do.

There is enough energy to maintain excitement and detail capture, in my opinion, but not enough to create listening fatigue during long sessions. I guess that's what matters. Isn't it?

The only area where some listeners might want more is the ultra high frequency extension.

Compared to some newer IEMs over $500, I would say DMA sacrifices a small amount of ultimate airiness in exchange for smoothness. Personally, I see this as a valuable trade off. Because it's quite successful in terms of price performance ratio.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

Excellent driver integration and impressive overall harmony
Natural and engaging mid frequency delivery
Rich bass with strong texture and physicality
Bone conduction application adds immersion without artificial sound
Wide and three dimensional soundstage
Comfortable ergonomic case design
High quality silver plated OCC cable included
Interchangeable 3.5mm and 4.4mm termination system
Easily driven from almost any source
Smooth and non fatiguing treble adjustment

Cons: 

Treble extension is somewhat limited compared to new flagship competitors
Original cable is good, but the interchangeable socket should have been locked with a screw system. The plug could come loose while on the move.

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's Take :

You may remember the Memory, a fantastic and retro designed IEM model co-produced by dd HiFi and Moondrop, which we previously reviewed in its >> USB Type C (CS43198 DAC chip) version. Now, two different versions of the much loved Memory model with 4.4mm outputs have been released. Now, with its 4.4mm outputs, the ddHiFi x Moondrop Memory 4.4, which allows us to hear its different character depending on the source, focuses on musical consistency, tonal balance, and technical performance.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

It's so small that when you hear its performance, you can't hide your amazement at how quickly modern planar technology has advanced.

Developed jointly by ddHiFi and Moondrop, the Memory 4.4 is a completely revamped duo of models compared to the original USB C version. Both the lightweight aluminum version and the luxurious palladium plated copper version use the same proprietary 13mm planar magnetic driver developed by Moondrop.

While the driver remains the same, each body material subtly influences the final presentation, giving listeners the chance to choose between absolute neutrality or a richer, more organic character. The aluminum version is slightly closer to reference monitoring with a cleaner and faster presentation, while the palladium version offers greater harmonic density, fuller note weight, and a slightly darker background without sacrificing detail capture. 

Unlike many planar IEMs that prioritize raw detail at the expense of musicality, I find the Memory 4.4 successful because it doesn't produce a clinical sound. The resolution is extremely high, but the music flows naturally. Each instrument occupies its own space without appearing artificially isolated, while vocals maintain convincing body and emotional realism. 

The more diverse your music library, the more impressive the versatility of these planar IEMs becomes. For listeners looking for one of the best tuned planar IEMs in this price category, I believe the Memory 4.4 is seriously worth considering.

The Memory AL4.4 uses aerospace grade aluminum alloy. It feels extremely lightweight in the ear and feels almost invisible during long listening sessions. Despite its lightweight construction, the workmanship is exceptional, offering flawless edges and a beautifully polished finish. The 

The Memory Pd4.4 uses precision machined pure copper in place of aluminum in the shell, followed by an elegant palladium finish. The added weight creates a more premium feel in the hand while also contributing somewhat to passive isolation. The palladium finish remains highly durable for extended use, while providing an impressive, luxurious, mirror like appearance. The aluminum version is polished and has a simpler look.

Sound Impression

Memory 4.4 focuses on precision and subtlety. Its presentation combines planar speed with natural timbre, excellent layering, and a sense of musical flow that encourages extremely long listening sessions and never becomes tiring.

The bass performance immediately demonstrates why modern planar drivers have become so popular.

The extension reaches impressively deep while maintaining exceptional control. The sub bass carries a convincing physical weight without being bloated, while the mid bass remains fast, textured, and exceptionally clean.

The kick drums strike with satisfying authority, the bass guitars exhibit exceptional texture, and electronic music benefits from excellent transition speed.

Both versions prioritize realism and articulation without exaggerating the amount of bass.

The aluminum version felt a little faster and tighter to me, while the palladium version offers added warmth and note density, making acoustic bass instruments sound even more realistic.

I would say this is a bass designed for mature listeners rather than bass enthusiasts.

The midrange represents the Memory 4.4's strongest point.

Voices have a remarkable realism, neither overly prominent nor artificially recessed. Male vocals carry satisfying chest resonance, while female vocals remain open, airy, and emotionally engaging. I must say I liked both presentations.

The instrument timbre, in my opinion, deserves special praise.

Pianos exhibit convincing harmonic richness, violins retain their natural sweetness without excessive brightness, and electric guitars offer excellent sharpness without becoming aggressive.

The planar speed ensures that dense arrangements remain perfectly organized. Even complex progressive rock or large orchestral recordings maintain exceptional instrument separation.

The treble remains comfortably smooth, stretching with excellent airiness.

Many planar IEMs become tiring due to high treble, as listeners know, but the Memory 4.4 is somewhat different.

Cymbals sparkle naturally, string harmonics are beautifully attenuated, and ambient recording information emerges without forcing it. Micro detail capture is remarkable for an IEM of this level, but musicality is always more important to me than analytical presentation. I can say that I listened without getting tired during long listening sessions.

Soundstage and Imaging: While the soundstage isn't the widest in the planar category, the proportions feel quite realistic. The breadth extends comfortably beyond the ears, the depth is particularly convincing, and instrument positioning remains remarkably stable.

Layering is where Memory truly shines. Individual instruments occupy clearly defined positions while maintaining believable spatial relationships.

Instead of creating an exaggerated holographic effect, it recreates an intimate live performance atmosphere with exceptional consistency.

In conclusion, my sound impression is that the Palladium version offers slightly fuller note weight, while the Aluminum version provides slightly sharper focus and transparency. If shell size, and therefore comfort, is your top priority, I don't think there's a better and higher quality sounding planar IEM option than this.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

The smallest and best tuned planar magnetic IEM series in its price category
Beautifully balanced sound signature combining technical precision with true musicality
Exceptional tonal harmony from bass to treble
Excellent bass texture with impressive speed and control
Natural and emotionally immersive mid frequency presentation
Smooth, extended highs with exceptional long term listening comfort
Excellent layering and instrument separation
Very responsive to source quality and scales noticeably with better DAPs
Excellent comfort despite the large 13mm planar driver
Superior workmanship and outstanding overall build quality
Both Aluminum and Palladium versions offer different sound personalities without compromising the basic tuning philosophy
Attractive retro inspired carrying case with excellent practicality

Cons: 

Fixed cable limits future upgrade possibilities
Requires a balanced 4.4mm source. (An adapter like the dd HiFi DJ44 Gold is needed to listen to 3.5mm sources)
The semi open design offers only moderate passive isolation
The soundstage is quite realistic but not the largest in the planar category

Electro Audio World's Take :

You may remember the Memory, a fantastic and retro designed IEM model co-produced by dd HiFi and Moondrop, which we previously reviewed in its >> USB Type C (CS43198 DAC chip) version. Now, two different versions of the much loved Memory model with 4.4mm outputs have been released. Now, with its 4.4mm outputs, the ddHiFi x Moondrop Memory 4.4, which allows us to hear its different character depending on the source, focuses on musical consistency, tonal balance, and technical performance.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

It's so small that when you hear its performance, you can't hide your amazement at how quickly modern planar technology has advanced.

Developed jointly by ddHiFi and Moondrop, the Memory 4.4 is a completely revamped duo of models compared to the original USB C version. Both the lightweight aluminum version and the luxurious palladium plated copper version use the same proprietary 13mm planar magnetic driver developed by Moondrop.

While the driver remains the same, each body material subtly influences the final presentation, giving listeners the chance to choose between absolute neutrality or a richer, more organic character. The aluminum version is slightly closer to reference monitoring with a cleaner and faster presentation, while the palladium version offers greater harmonic density, fuller note weight, and a slightly darker background without sacrificing detail capture. 

Unlike many planar IEMs that prioritize raw detail at the expense of musicality, I find the Memory 4.4 successful because it doesn't produce a clinical sound. The resolution is extremely high, but the music flows naturally. Each instrument occupies its own space without appearing artificially isolated, while vocals maintain convincing body and emotional realism. 

The more diverse your music library, the more impressive the versatility of these planar IEMs becomes. For listeners looking for one of the best tuned planar IEMs in this price category, I believe the Memory 4.4 is seriously worth considering.

The Memory AL4.4 uses aerospace grade aluminum alloy. It feels extremely lightweight in the ear and feels almost invisible during long listening sessions. Despite its lightweight construction, the workmanship is exceptional, offering flawless edges and a beautifully polished finish. The 

The Memory Pd4.4 uses precision machined pure copper in place of aluminum in the shell, followed by an elegant palladium finish. The added weight creates a more premium feel in the hand while also contributing somewhat to passive isolation. The palladium finish remains highly durable for extended use, while providing an impressive, luxurious, mirror like appearance. The aluminum version is polished and has a simpler look.

Sound Impression

Memory 4.4 focuses on precision and subtlety. Its presentation combines planar speed with natural timbre, excellent layering, and a sense of musical flow that encourages extremely long listening sessions and never becomes tiring.

The bass performance immediately demonstrates why modern planar drivers have become so popular.

The extension reaches impressively deep while maintaining exceptional control. The sub bass carries a convincing physical weight without being bloated, while the mid bass remains fast, textured, and exceptionally clean.

The kick drums strike with satisfying authority, the bass guitars exhibit exceptional texture, and electronic music benefits from excellent transition speed.

Both versions prioritize realism and articulation without exaggerating the amount of bass.

The aluminum version felt a little faster and tighter to me, while the palladium version offers added warmth and note density, making acoustic bass instruments sound even more realistic.

I would say this is a bass designed for mature listeners rather than bass enthusiasts.

The midrange represents the Memory 4.4's strongest point.

Voices have a remarkable realism, neither overly prominent nor artificially recessed. Male vocals carry satisfying chest resonance, while female vocals remain open, airy, and emotionally engaging. I must say I liked both presentations.

The instrument timbre, in my opinion, deserves special praise.

Pianos exhibit convincing harmonic richness, violins retain their natural sweetness without excessive brightness, and electric guitars offer excellent sharpness without becoming aggressive.

The planar speed ensures that dense arrangements remain perfectly organized. Even complex progressive rock or large orchestral recordings maintain exceptional instrument separation.

The treble remains comfortably smooth, stretching with excellent airiness.

Many planar IEMs become tiring due to high treble, as listeners know, but the Memory 4.4 is somewhat different.

Cymbals sparkle naturally, string harmonics are beautifully attenuated, and ambient recording information emerges without forcing it. Micro detail capture is remarkable for an IEM of this level, but musicality is always more important to me than analytical presentation. I can say that I listened without getting tired during long listening sessions.

Soundstage and Imaging: While the soundstage isn't the widest in the planar category, the proportions feel quite realistic. The breadth extends comfortably beyond the ears, the depth is particularly convincing, and instrument positioning remains remarkably stable.

Layering is where Memory truly shines. Individual instruments occupy clearly defined positions while maintaining believable spatial relationships.

Instead of creating an exaggerated holographic effect, it recreates an intimate live performance atmosphere with exceptional consistency.

In conclusion, my sound impression is that the Palladium version offers slightly fuller note weight, while the Aluminum version provides slightly sharper focus and transparency. If shell size, and therefore comfort, is your top priority, I don't think there's a better and higher quality sounding planar IEM option than this.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

The smallest and best tuned planar magnetic IEM series in its price category
Beautifully balanced sound signature combining technical precision with true musicality
Exceptional tonal harmony from bass to treble
Excellent bass texture with impressive speed and control
Natural and emotionally immersive mid frequency presentation
Smooth, extended highs with exceptional long term listening comfort
Excellent layering and instrument separation
Very responsive to source quality and scales noticeably with better DAPs
Excellent comfort despite the large 13mm planar driver
Superior workmanship and outstanding overall build quality
Both Aluminum and Palladium versions offer different sound personalities without compromising the basic tuning philosophy
Attractive retro inspired carrying case with excellent practicality

Cons: 

Fixed cable limits future upgrade possibilities
Requires a balanced 4.4mm source. (An adapter like the dd HiFi DJ44 Gold is needed to listen to 3.5mm sources)
The semi open design offers only moderate passive isolation
The soundstage is quite realistic but not the largest in the planar category

I love small but high quality DAPs that I can carry with me daily. And I always try to acquire sound characteristics that aren't already in my collection. The Surfans F35 was one of the few DAPs I'd been waiting a long time to review, and I finally decided to buy one.

When I learned it was built on the ESS Sabre ES9038Q2M DAC, I expected the familiar characteristics that most audiophiles associate with modern ESS applications: razor sharp detail, analytical precision, perhaps a slightly cooler tonality.

But in the F35, I heard a character I didn't expect from the ESS DAC chip at all.

The F35 retains all the technical advantages that make the ES9038Q2M one of the most respected DAC chips in portable audio, but somehow avoids producing a clinical or sterile sound.

We saw a similar approach in the Hidizs AP80 Pro MAX. Surfans, however, has managed to produce a wide, vibrant, and highly resolute presentation without becoming tiring by precisely engineering the F35 player.

In many ways, it feels like an ESS DAC designed by people who have listened to music for many years and have quite good ears.

This made the F35 much more interesting than I expected.

Sound Signature :

The ES9038Q2M is known for its exceptional dynamic range, excellent channel separation, and extremely low distortion rate. These features are immediately noticeable in the F35 as well.

However, unlike many applications that emphasize technical precision above all else, the F35 offers a pleasant sense of musicality.

I would best describe its overall presentation as:

Open, Energetic, Broad, Transparent, Lightly Musical, Wonderfully Cool

This isn't a hot DAP, but it's not aggressively analytical either. There's a great balance.

I would say it's a player that remains exciting without becoming tiring, with a remarkably satisfying balance between technical performance and musical interaction.

Head-Fi >>  Click here to read the full review, including audio source comparisons and pairings with different IEMs.

User Interface and Daily Use :

Unlike Android based digital audio players, the Surfans F35 uses a much simpler application. No streaming apps. No background services. No unnecessary complexity. The interface is entirely focused on local music playback.

The Surfans F35 uses a customized version of the Linux based HiBy OS, licensed to OEM manufacturers by HiBy. Surfans has added its own interface theme and some settings on top of this. It has a rather fun theme, Street (I use this one).

Navigation is fast, menus are simple, and physical controls make blind use quite easy once you get familiar with the layout.

Startup times are fast, and battery life is quite good. (In tests, I achieved an average of 8.5 hours of battery life listening to FLAC files with the 4.4mm balanced output across three different charging cycles.)

.

Technical Specifications:

DAC: ESS Sabre ES9038Q2M

Display: 3.5 inch IPS touchscreen

Outputs: 3.5mm Single Ended • 4.4mm Balanced

Storage: microSD expansion

Battery Life: Up to approximately 10 hours

Standby Time: Up to 25 days

​Battery Capacity: 3000mAh 3.7V Li-Polymer

Charging Time: ~2 to 3 hours using a 5V/2A adapter 

Supported Formats: FLAC, WAV, DSD, APE, ALAC, AIFF, MP3 and more

USB: USB-C

.

Pros: 

Excellent implementation of the ESS ES9038Q2M DAC
Wide, airy, and holographic presentation
Impressive mid frequency clarity and vocal reproduction
Fast, well controlled, and excellently textured bass
Extremely detailed but fatigue free highs
Excellent instrument separation and rendering
Good synergy with both planar and dynamic driver IEMs
Responsive user interface with impressive battery life
Outstanding price performance ratio

Cons: 

Local playback only, no Android or streaming apps
User interface is functional rather than modern
Layering lags slightly behind more expensive Android DAPs

* * * Click here to read the full review, including audio source comparisons and pairings with different IEMs.

.

I love small but high quality DAPs that I can carry with me daily. And I always try to acquire sound characteristics that aren't already in my collection. The Surfans F35 was one of the few DAPs I'd been waiting a long time to review, and I finally decided to buy one.

When I learned it was built on the ESS Sabre ES9038Q2M DAC, I expected the familiar characteristics that most audiophiles associate with modern ESS applications: razor sharp detail, analytical precision, perhaps a slightly cooler tonality.

But in the F35, I heard a character I didn't expect from the ESS DAC chip at all.

The F35 retains all the technical advantages that make the ES9038Q2M one of the most respected DAC chips in portable audio, but somehow avoids producing a clinical or sterile sound.

We saw a similar approach in the Hidizs AP80 Pro MAX. Surfans, however, has managed to produce a wide, vibrant, and highly resolute presentation without becoming tiring by precisely engineering the F35 player.

In many ways, it feels like an ESS DAC designed by people who have listened to music for many years and have quite good ears.

This made the F35 much more interesting than I expected.

Sound Signature :

The ES9038Q2M is known for its exceptional dynamic range, excellent channel separation, and extremely low distortion rate. These features are immediately noticeable in the F35 as well.

However, unlike many applications that emphasize technical precision above all else, the F35 offers a pleasant sense of musicality.

I would best describe its overall presentation as:

Open, Energetic, Broad, Transparent, Lightly Musical, Wonderfully Cool

This isn't a hot DAP, but it's not aggressively analytical either. There's a great balance.

I would say it's a player that remains exciting without becoming tiring, with a remarkably satisfying balance between technical performance and musical interaction.

Head-Fi >> Click here to read the full review, including audio source comparisons and pairings with different IEMs.

User Interface and Daily Use :

Unlike Android based digital audio players, the Surfans F35 uses a much simpler application. No streaming apps. No background services. No unnecessary complexity. The interface is entirely focused on local music playback.

The Surfans F35 uses a customized version of the Linux based HiBy OS, licensed to OEM manufacturers by HiBy. Surfans has added its own interface theme and some settings on top of this. It has a rather fun theme, Street (I use this one).

Navigation is fast, menus are simple, and physical controls make blind use quite easy once you get familiar with the layout.

Startup times are fast, and battery life is quite good. (In tests, I achieved an average of 8.5 hours of battery life listening to FLAC files with the 4.4mm balanced output across three different charging cycles.)

.

Technical Specifications:

DAC: ESS Sabre ES9038Q2M

Display: 3.5 inch IPS touchscreen

Outputs: 3.5mm Single Ended • 4.4mm Balanced

Storage: microSD expansion

Battery Life: Up to approximately 10 hours

Standby Time: Up to 25 days

​Battery Capacity: 3000mAh 3.7V Li-Polymer

Charging Time: ~2 to 3 hours using a 5V/2A adapter 

Supported Formats: FLAC, WAV, DSD, APE, ALAC, AIFF, MP3 and more

USB: USB-C

.

Pros: 

Excellent implementation of the ESS ES9038Q2M DAC
Wide, airy, and holographic presentation
Impressive mid frequency clarity and vocal reproduction
Fast, well controlled, and excellently textured bass
Extremely detailed but fatigue free highs
Excellent instrument separation and rendering
Good synergy with both planar and dynamic driver IEMs
Responsive user interface with impressive battery life
Outstanding price performance ratio

Cons: 

Local playback only, no Android or streaming apps
User interface is functional rather than modern
Layering lags slightly behind more expensive Android DAPs

* * * Click here to read the full review, including audio source comparisons and pairings with different IEMs.

.

Electro Audio World's Take - First Impressions :

The true wireless earbud market has matured significantly in the last few years. Whenever I get the chance, I try to test the top versions of various brands and hear how far they've gone.

Features on TWS have become increasingly sophisticated, active noise cancellation has improved, battery life can reach far longer periods than once seemed possible, and wireless connectivity is more reliable than ever.

However, despite all these advancements, one area often remains a compromise point for serious audiophiles: sound quality.

As someone who spends most of my listening time with dedicated digital audio players, desktop amplifiers, and high performance IEM’s, I wasn't approaching a TWS product with true audiophile sound expectations. Convenience and portability are great, but they generally sound different from IEMs, with a noticeable difference in sound quality.

The Acoustune HSX One is a TWS that changed that thinking.

What surprised me wasn't the feature set, the ANC implementation, or even its distinctive industrial design. What truly caught me off guard was the sheer level of detail emanating from a wireless earbud. It's clear Acoustune approached this project differently than most manufacturers. They're entirely focused on sound quality.

The HSX One doesn't sound like a traditional consumer focused TWS earbud. Acoustune, known for producing serious IEMs, decided to create a wireless product without abandoning its core philosophy. And that difference becomes apparent the moment music starts playing. I think they succeeded.

Acoustune has equipped the HSX One with its proprietary third generation Myrinx dynamic driver, housed within a precisely machined aluminum acoustic chamber. While these specifications look impressive on paper, the real story begins with the tuning and technical execution. This is one of the highest resolution, clearest, and most technically capable true wireless earbuds I've ever heard.

Many modern TWS products create an illusion of detail by boosting high frequencies or exaggerating certain parts of the spectrum. The result is often a sound that initially seems impressive but eventually becomes tiring. The HSX One, however, feels expert level in detail capture. The resolution feels natural.

Every morning when I went for a walk, I used to take my IEM and a small DAP with me. Now I pair my iPhone 14 Pro Max with the HSX One. And I hardly feel the slightest lack of anything. This might sound like an exaggeration, but you'll definitely agree when you listen. The HSX One is so good that it compels you to do it. You can't deny what you hear.

Its technical capability stems primarily from driver quality, rather than tuning tricks. This distinction alone places it in a category far different from most of its competitors. You know, some IEM manufacturers still use a single dynamic driver in their thousands of dollar IEMs. So whether it's a single driver or 20 drivers, the sound quality absolutely depends on the pure quality of that driver.

Sound Performance :

If there's one area where the HSX One truly sets itself apart from the vast majority of the true wireless earbuds market, it's its technical performance, in my opinion.

Many TWS earbuds today use high bass, boosted upper mid frequencies, and bright highs to create excitement, instantly captivating an effect during a short listen. We've all experienced this. The problem is that this approach rarely translates into true long term listening satisfaction. Resolution and detail capture are often sacrificed in favor of a more dramatic presentation.

And that's where the HSX One begins to tell you why you'll be impressed.

Its tuning is refined, balanced, and remarkably transparent, allowing the quality of the driver to become the focal point of the listening experience.

Pros: 

Exceptional detail capture for a true wireless design
Superior imaging and instrument separation
High resolution third generation Myrinx driver
Balanced and mature tuning
Excellent vocal reproduction
Controlled and textured bass response
Extended but fatigue free highs
Superior quality metal acoustic cabinet construction
Comfortable fit for long listening sessions
Physical buttons offer reliable operation
aptX Adaptive and aptX Lossless support
Wireless charging support

Cons: 

ANC performance is good rather than best in class
Listeners seeking heavy bass emphasis may want more low frequency content
Utility app functionality is relatively simple compared to larger brands

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's Take - First Impressions :

The true wireless earbud market has matured significantly in the last few years. Whenever I get the chance, I try to test the top versions of various brands and hear how far they've gone.

Features on TWS have become increasingly sophisticated, active noise cancellation has improved, battery life can reach far longer periods than once seemed possible, and wireless connectivity is more reliable than ever.

However, despite all these advancements, one area often remains a compromise point for serious audiophiles: sound quality.

As someone who spends most of my listening time with dedicated digital audio players, desktop amplifiers, and high performance IEM’s, I wasn't approaching a TWS product with true audiophile sound expectations. Convenience and portability are great, but they generally sound different from IEMs, with a noticeable difference in sound quality.

The Acoustune HSX One is a TWS that changed that thinking.

What surprised me wasn't the feature set, the ANC implementation, or even its distinctive industrial design. What truly caught me off guard was the sheer level of detail emanating from a wireless earbud. It's clear Acoustune approached this project differently than most manufacturers. They're entirely focused on sound quality.

The HSX One doesn't sound like a traditional consumer focused TWS earbud. Acoustune, known for producing serious IEMs, decided to create a wireless product without abandoning its core philosophy. And that difference becomes apparent the moment music starts playing. I think they succeeded.

Acoustune has equipped the HSX One with its proprietary third generation Myrinx dynamic driver, housed within a precisely machined aluminum acoustic chamber. While these specifications look impressive on paper, the real story begins with the tuning and technical execution. This is one of the highest resolution, clearest, and most technically capable true wireless earbuds I've ever heard.

Many modern TWS products create an illusion of detail by boosting high frequencies or exaggerating certain parts of the spectrum. The result is often a sound that initially seems impressive but eventually becomes tiring. The HSX One, however, feels expert level in detail capture. The resolution feels natural.

Every morning when I went for a walk, I used to take my IEM and a small DAP with me. Now I pair my iPhone 14 Pro Max with the HSX One. And I hardly feel the slightest lack of anything. This might sound like an exaggeration, but you'll definitely agree when you listen. The HSX One is so good that it compels you to do it. You can't deny what you hear.

Its technical capability stems primarily from driver quality, rather than tuning tricks. This distinction alone places it in a category far different from most of its competitors. You know, some IEM manufacturers still use a single dynamic driver in their thousands of dollar IEMs. So whether it's a single driver or 20 drivers, the sound quality absolutely depends on the pure quality of that driver.

Sound Performance :

If there's one area where the HSX One truly sets itself apart from the vast majority of the true wireless earbuds market, it's its technical performance, in my opinion.

Many TWS earbuds today use high bass, boosted upper mid frequencies, and bright highs to create excitement, instantly captivating an effect during a short listen. We've all experienced this. The problem is that this approach rarely translates into true long term listening satisfaction. Resolution and detail capture are often sacrificed in favor of a more dramatic presentation.

And that's where the HSX One begins to tell you why you'll be impressed.

Its tuning is refined, balanced, and remarkably transparent, allowing the quality of the driver to become the focal point of the listening experience.

Pros: 

Exceptional detail capture for a true wireless design
Superior imaging and instrument separation
High resolution third generation Myrinx driver
Balanced and mature tuning
Excellent vocal reproduction
Controlled and textured bass response
Extended but fatigue free highs
Superior quality metal acoustic cabinet construction
Comfortable fit for long listening sessions
Physical buttons offer reliable operation
aptX Adaptive and aptX Lossless support
Wireless charging support

Cons: 

ANC performance is good rather than best in class
Listeners seeking heavy bass emphasis may want more low frequency content
Utility app functionality is relatively simple compared to larger brands

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's Take - First Impressions :

The true wireless earbud market has matured significantly in the last few years. Whenever I get the chance, I try to test the top versions of various brands and hear how far they've gone.

Features on TWS have become increasingly sophisticated, active noise cancellation has improved, battery life can reach far longer periods than once seemed possible, and wireless connectivity is more reliable than ever.

However, despite all these advancements, one area often remains a compromise point for serious audiophiles: sound quality.

As someone who spends most of my listening time with dedicated digital audio players, desktop amplifiers, and high performance IEM’s, I wasn't approaching a TWS product with true audiophile sound expectations. Convenience and portability are great, but they generally sound different from IEMs, with a noticeable difference in sound quality.

The Acoustune HSX One is a TWS that changed that thinking.

What surprised me wasn't the feature set, the ANC implementation, or even its distinctive industrial design. What truly caught me off guard was the sheer level of detail emanating from a wireless earbud. It's clear Acoustune approached this project differently than most manufacturers. They're entirely focused on sound quality.

The HSX One doesn't sound like a traditional consumer focused TWS earbud. Acoustune, known for producing serious IEMs, decided to create a wireless product without abandoning its core philosophy. And that difference becomes apparent the moment music starts playing. I think they succeeded.

Acoustune has equipped the HSX One with its proprietary third generation Myrinx dynamic driver, housed within a precisely machined aluminum acoustic chamber. While these specifications look impressive on paper, the real story begins with the tuning and technical execution. This is one of the highest resolution, clearest, and most technically capable true wireless earbuds I've ever heard.

Many modern TWS products create an illusion of detail by boosting high frequencies or exaggerating certain parts of the spectrum. The result is often a sound that initially seems impressive but eventually becomes tiring. The HSX One, however, feels expert level in detail capture. The resolution feels natural.

Every morning when I went for a walk, I used to take my IEM and a small DAP with me. Now I pair my iPhone 14 Pro Max with the HSX One. And I hardly feel the slightest lack of anything. This might sound like an exaggeration, but you'll definitely agree when you listen. The HSX One is so good that it compels you to do it. You can't deny what you hear.

Its technical capability stems primarily from driver quality, rather than tuning tricks. This distinction alone places it in a category far different from most of its competitors. You know, some IEM manufacturers still use a single dynamic driver in their thousands of dollar IEMs. So whether it's a single driver or 20 drivers, the sound quality absolutely depends on the pure quality of that driver.

Sound Performance :

If there's one area where the HSX One truly sets itself apart from the vast majority of the true wireless earbuds market, it's its technical performance, in my opinion.

Many TWS earbuds today use high bass, boosted upper mid frequencies, and bright highs to create excitement, instantly captivating an effect during a short listen. We've all experienced this. The problem is that this approach rarely translates into true long term listening satisfaction. Resolution and detail capture are often sacrificed in favor of a more dramatic presentation.

And that's where the HSX One begins to tell you why you'll be impressed.

Its tuning is refined, balanced, and remarkably transparent, allowing the quality of the driver to become the focal point of the listening experience.

Pros: 

Exceptional detail capture for a true wireless design
Superior imaging and instrument separation
High resolution third generation Myrinx driver
Balanced and mature tuning
Excellent vocal reproduction
Controlled and textured bass response
Extended but fatigue free highs
Superior quality metal acoustic cabinet construction
Comfortable fit for long listening sessions
Physical buttons offer reliable operation
aptX Adaptive and aptX Lossless support
Wireless charging support

Cons: 

ANC performance is good rather than best in class
Listeners seeking heavy bass emphasis may want more low frequency content
Utility app functionality is relatively simple compared to larger brands

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's take :

I finally have the open back IEM I've been waiting for, and I want to share my first impressions with you.

At the heart of the Septet lies an extremely sophisticated Quadbrid architecture:

1x Dynamic Driver: Responsible for bass and sub bass reproduction with excellent physicality and extension.

4x Balanced Armatures: Handle critical mid and lower treble regions through a carefully implemented crossover network.

1x Micro Planar Transducer: Designed for ultra high frequency extension and air recovery.

1x Piezoelectric Driver: Provides extra brightness, harmonic information, and high frequency energy.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

On paper, this combination seems a bit extreme. But in practice, it creates something truly unique. And we're talking about an open back IEM.

The Septet doesn't sound like a traditional hybrid. It doesn't sound like a planar IEM. It doesn't sound like a fully balanced armature focused monitor. Perfectly arranged and wonderfully tuned, it occupies a fascinating middle ground between them all.

Unlike most closed shell headphones, the Septet creates an impression of air freely moving around the instruments. The notes seem less constrained by physical boundaries. The sound breathes naturally. The open back architecture plays a big role here.

Don't get me wrong, there's pretty good isolation here with a tip that fits you right out of the box. You don't hear distracting noises from the outside, but these headphones have an open back design, and you feel it while listening.

Instead of the typical in ear presentation seen in many IEMs, the Septet projects music into a much wider acoustic environment.

It's immediately noticeable with live recordings, orchestral works, acoustic jazz, and progressive rock. The listener is offered an unusually wide soundstage for an IEM in this price segment.

Many wide sounding IEMs achieve their wide presentation by thinning out the note weight. The Septet completely avoids this mistake.

The bass remains strong. The vocals remain stable. The treble remains extended. Everything feels connected. This consistency is perhaps the greatest success of Kiwi Ears' crossover implementation.

The dynamic driver bass, the balanced armature midfrequencies, and the transition between planar air and piezoelectric glow are exceptionally seamless.

At no point does the listener realize that the individual drivers are operating independently.

The entire system acts like a single transducer. And this is a much more difficult task than most enthusiasts realize. However, I must say very clearly that this IEM demands more power than other ordinary IEMs. If possible, you should power the Septet with a good DAP or a powerful DAC amp. That's when the experience becomes completely different.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

Open soundstage thanks to open back design
High resolution quad driver system with excellent technical capabilities
Deep, textured and layered bass performance
Clear and prominent midfrequencies with strong vocal intelligibility
Excellent treble extension with planar and piezoelectric synergy
Strong scalability across different source qualities
Maintained core tonal identity in all tested DAC and DAP pairings
Lightweight, ergonomic and robust full metal body design
Modular quality cable system with 3.5mm and 4.4mm support

Cons: 

Requires higher quality and more powerful sources to fully demonstrate its technical potential

Open back design may cause some sound leakage, limiting portable use scenarios.

May produce a slightly bright or energetic sound with very detailed sources

The stock tips included in the box could have been better.

(Because in Kiwi's IEMs in the same price range, like Astral, the stock tips are really good.)

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

Electro Audio World's take :

I finally have the open back IEM I've been waiting for, and I want to share my first impressions with you.

At the heart of the Septet lies an extremely sophisticated Quadbrid architecture:

1x Dynamic Driver: Responsible for bass and sub bass reproduction with excellent physicality and extension.

4x Balanced Armatures: Handle critical mid and lower treble regions through a carefully implemented crossover network.

1x Micro Planar Transducer: Designed for ultra high frequency extension and air recovery.

1x Piezoelectric Driver: Provides extra brightness, harmonic information, and high frequency energy.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

On paper, this combination seems a bit extreme. But in practice, it creates something truly unique. And we're talking about an open back IEM.

The Septet doesn't sound like a traditional hybrid. It doesn't sound like a planar IEM. It doesn't sound like a fully balanced armature focused monitor. Perfectly arranged and wonderfully tuned, it occupies a fascinating middle ground between them all.

Unlike most closed shell headphones, the Septet creates an impression of air freely moving around the instruments. The notes seem less constrained by physical boundaries. The sound breathes naturally. The open back architecture plays a big role here.

Don't get me wrong, there's pretty good isolation here with a tip that fits you right out of the box. You don't hear distracting noises from the outside, but these headphones have an open back design, and you feel it while listening.

Instead of the typical in ear presentation seen in many IEMs, the Septet projects music into a much wider acoustic environment.

It's immediately noticeable with live recordings, orchestral works, acoustic jazz, and progressive rock. The listener is offered an unusually wide soundstage for an IEM in this price segment.

Many wide sounding IEMs achieve their wide presentation by thinning out the note weight. The Septet completely avoids this mistake.

The bass remains strong. The vocals remain stable. The treble remains extended. Everything feels connected. This consistency is perhaps the greatest success of Kiwi Ears' crossover implementation.

The dynamic driver bass, the balanced armature midfrequencies, and the transition between planar air and piezoelectric glow are exceptionally seamless.

At no point does the listener realize that the individual drivers are operating independently.

The entire system acts like a single transducer. And this is a much more difficult task than most enthusiasts realize. However, I must say very clearly that this IEM demands more power than other ordinary IEMs. If possible, you should power the Septet with a good DAP or a powerful DAC amp. That's when the experience becomes completely different.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

Open soundstage thanks to open back design
High resolution quad driver system with excellent technical capabilities
Deep, textured and layered bass performance
Clear and prominent midfrequencies with strong vocal intelligibility
Excellent treble extension with planar and piezoelectric synergy
Strong scalability across different source qualities
Maintained core tonal identity in all tested DAC and DAP pairings
Lightweight, ergonomic and robust full metal body design
Modular quality cable system with 3.5mm and 4.4mm support

Cons: 

Requires higher quality and more powerful sources to fully demonstrate its technical potential

Open back design may cause some sound leakage, limiting portable use scenarios.

May produce a slightly bright or energetic sound with very detailed sources

The stock tips included in the box could have been better.

(Because in Kiwi's IEMs in the same price range, like Astral, the stock tips are really good.)

.

All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

.

First Impressions

Do you want a superb critical listening headset with a unique silver plated skeletonized front end? The new NF Acous NM25 Ossuary Silver Edition stands out from the burgeoning world of modern IEMs, immediately captivating me at first sight. I already highly praised and reviewed the new Standard NM25, sharing my thoughts with you. Even the Standard model boasts a design language inspired by professional monitors. This special edition, with its 925 sterling silver front end, is perhaps more accurately described as a wearable work of art rather than a traditional audio product.

Priced at $299, the NM25 Ossuary Silver Edition is a limited edition collaboration between NF Acous and Ossuary, a silver accessory design studio known for its dark gothic aesthetics and handcrafted silver designs. Unlike typical cosmetic special editions, this version features genuine 925 sterling silver front plates adorned with Ossuary's signature skull themed artwork, giving each earbud a striking visual identity that instantly catches the eye. The collaboration focuses on craftsmanship and exclusivity while preserving the acoustic character of the original NM25.

What's surprising is how premium these IEMs feel when you hold them in your hand. They're definitely a design that can compete with IEMs costing over $1000. The combination of the all metal cold body and handcrafted silver front plates creates a sense of density and luxury rarely found in this price range. This is the kind of product that invites you to examine every detail even before connecting it to the source. The moment you put them in your ears, all curious eyes start asking, "What model is this?" Yes, you'll notice many people outside trying to examine this IEM and find out what make and model it is.

For collectors and enthusiasts who appreciate unique designs as much as sound quality, the NM25 Ossuary Silver Edition offers something truly different. It's not just another limited edition with a new color scheme. Instead, it feels like a celebration of craftsmanship that few IEM's dare to achieve, combining high quality sound with handcrafted silver artistry.

Overall Sound Character – Understanding the Spirit of the NM25

If I had to summarize the NM25's character in one sentence, it would be: raw, powerful, fast, and with a perfect soundstage.

This IEM proves itself not with excessive bass or artificially boosted treble details, but with realistic power, convincing speed, and precise rhythmic accuracy. Especially in metal and rock music, it reproduces kick drums, double pedal passages, and aggressive vocals with a very convincing sense of energy.

The soundstage is convincing. Perhaps not huge, but the depth, layering, and instrument placement are good. Instead of making you feel like you're in a massive stadium, the NM25 places you in a tight, powerful, and very lively studio or club environment. It gives a good, intimate feel.

Bass Performance: Fast, Controlled, and Effective

Despite using only a single dynamic driver, the NM25's bass performance is impressive. The sub bass extension is satisfying, the mid bass is powerful without feeling bloated, the impact is very clear and physical, the decay is fast and controlled, there is no muddiness or obstruction.

Thanks to the dual magnetic circuit and dual acoustic chamber design, the bass comes across as both distinct and clean at the same time. Especially in metal, kick drums, contrabass sections, bass guitar passages, and low frequencies that are often lost under distortion remain clear and powerful on the NM25.

Midrange Performance: A soul designed for vocals and guitars

My favorite part of the NM25 has been its mid frequencies. Both vocals and guitars sound incredibly solid, natural, and intimate.

Vocals are full, clear, and slightly prominent. Clean guitars sound lively.
Metal riffs are hard and thick. Instrument bodies feel realistic.
No strain or fatigue. The source you use is important here.

For metal fans, getting the guitar tone right is crucial. Many IEMs make guitars either too warm or too bright. The NM25 manages to strike this balance surprisingly well.

Guitar riffs are fast and detailed, while vocals are placed with the right weight and position in the mix. The mid frequencies manage to be both technically capable and musical at the same time. I really liked this combination.

Treble Performance: Clean, Controlled and Airy

The NM25's treble is clean, clear and well sustained. It's never harsh or piercing. It doesn't contain significant sibilance. It's not tiring even on long listening sessions. But as I said, choosing the right source is very important here.

Since the frequency response extends to 40 kHz, the sense of airiness is convincing. The sounds of metal instruments like cymbals are clearly audible, but they don't take on an aggressive or harsh tone. The upper harmonics are present and prominent, but never high pitched.

This IEM delivers the treble accurately and in a controlled manner. Listening to metal music with the NM25 truly becomes an enjoyable journey. To be honest, whenever I want to listen to metal music, I feel like I especially need this IEM with me at all times. It has a fixed place in my collector's bag.

-

Product Official Link >>  https://nfacous.com/products/nm25

-

Technical Specifications

Driver type: Single dynamic driver (MC2L 100A custom driver)

Dual magnetic circuit, dual acoustic chamber, zoned damping system

Frequency response: 9 Hz to 40 kHz

Impedance: 32 ohms

Sensitivity: 108 dB per mW

Distortion: Less than 1 percent

Maximum SPL: 125 dB

Cable: 5N silver plated OFC, 0.78 millimeter 2 pin

Shell: 925 Silver Faceplate + Full metal aviation grade housing (five axis CNC machining)

Target genres: Metal, rock, progressive, fast and complex music

*

* All photos were taken by ADR >> Instagram: u/electroaudioworld

Used photo Gear : Sony A7 III + Sigma 24–70mm F/2.8 DG DN II Art Lens

*

The IEM I reviewed this week is quite meticulously crafted, and its sound character is remarkably impressive. I've listened to countless affordable and mid range IEMs over the years. Some impressed with their sound settings, others with their technical performance.

Very few managed to surprise me like the Oak Nano. Of course, what I'm going to say applies to this price range, as always. That is, we're talking about the average $500 range.

After using it for a few weeks with various sources, music genres, and listening environments, I realized I reached for it much more often than I initially expected.

It's not just one standout feature that makes the OAK Nano special. It's the balance it strikes between musicality, detail capture, tonal realism, and long term listening comfort.

Many affordable dynamic driver headphones force listeners to choose between warmth and detail, bass quantity and mid frequency clarity, or technical performance and musical enjoyment.

The OAK Nano manages these compromises quite effectively and well in its own way.

Built around a beryllium coated dynamic driver, this product delivers a mature, consistent, and surprisingly refined presentation for its price category.

After extensive listening sessions, I believe the OAK Nano currently represents one of the strongest values available in its single dynamic driver segment, averaging around $500.

*** To read the full review, including source matching and comparisons with other IEMs, click here.

Pros: 

Excellent Beryllium driver
Outstanding tonal balance in its price category
Natural and realistic timbre
Extremely detailed without becoming analytical
Excellent source scalability
Controlled and textured bass response
Clean and transparent mid frequencies
Smooth yet extended highs
Comfortable for long listening sessions
Outstanding price performance ratio

Cons: 

Bass enthusiasts may want more bass
Soundstage certainly can't match high end IEMs like the FX17
Requires quality sources to reach its full potential
Default settings prioritize balance over excitement.

Official Link >> https://www.fiio.com/oaknano

.

Get ready for a musical experience like in the old days...

I've used and discarded dozens of DAPs and DAC amps. But what I finally realized was that I generally preferred Sony DAPs and those closer to analog sound (including DAPs with AKM DACs) rather than the ones that produced the brightest, most analytical, or most detailed sound. This is because the sound frequency range was the most suitable for the human hearing range and never uncomfortable.

For years, portable audio devices have largely followed a predictable path. More processing power, more decoding formats, higher output values, increasingly complex software ecosystems, and constantly evolving metrics. Most manufacturers aimed for technical perfection with Delta Sigma DAC implementations, often achieving remarkable levels of transparency and detail. But here, another manufacturer, Sony, is deviating from this sharp path everyone else is taking.

FiiO is taking a different approach with the new M33 R2R to recreate an emotional connection with music like in the old days.

Instead of chasing absolute analytical precision in every model, it focuses on something many seasoned audiophiles my age eventually find themselves searching for again: natural music flow.

As the first Android based portable player built around Fiio’s proprietary fully differential R2R architecture, this device brings a technology once reserved for expensive desktop equipment into a truly portable form factor.

After spending a significant amount of time with the M33 R2R, I came to a simple conclusion:

You completely stop analyzing music while listening and immerse yourself in the rhythm of the song, and you don’t want to change it. Whenever I missed that feeling, I would reach for my Sony NW-ZX507 DAP next to me. Now I have a second analog DAP on my desk for that. I’m sure this device is designed to let you enjoy your favorite album from beginning to end.

* * * My M33 R2R Head-Fi Full Review >>> You can read the full comparative analysis here.

Design and Daily Use Experience:

The first thing that stands out about the M33 R2R is how easy and convenient it is.

While many modern DAPs are getting bigger and heavier, the M33 truly maintains its portable dimensions. The aluminum chassis feels solid without being bulky, and at around 258 grams, it's quite comfortable for everyday use, in my opinion.

The 5.5 inch Full HD screen is sharp, responsive, and more than adequate for streaming services, local library navigation, and album art. Powered by a Snapdragon 680 processor with 8GB of RAM, the overall responsiveness of the device is closer to a modern smartphone than a traditional audio player.

Apps launch quickly. Library browsing is fast. Streaming services run smoothly. Android 13 feels mature and stable throughout the experience with this fast processor.

The addition of two USB C ports is a particularly thoughtful feature. One port handles data and charging, while the dedicated power input enables Desktop Mode, allowing the player to run from external power without constantly turning the battery on and off. I definitely needed this. For users who spend significant time at their desks, I think this feature alone adds meaningful value in the long run.

Everything about the M33 felt thoughtful rather than just feature packed.

The Technology Behind Analog Audio:

The defining feature of the M33 R2R is its proprietary fully differential 24 bit resistor ladder DAC designed by FiiO.

Unlike traditional Delta Sigma DAC chips (ESS, CS, AKM) that dominate the portable audio market, the M33 uses a network of precisely matched resistors arranged in a balanced ladder architecture.

While technical discussions about R2R are often overly romanticized, the practical reality is simpler, in my opinion:

A well implemented R2R implementation tends to prioritize tonal density, natural distortion characteristics, and harmonic realism rather than aggressive detail presentation.

The M33 R2R embodies precisely these strengths.

FiiO further complements this architecture with dual femtosecond oscillators, FPGA based clock management, a fully balanced amplification topology, and selectable NOS (No Sample) and OS (Sampled) modes.

In most of my listening sessions, NOS mode became my preferred overall setting. This is where the M33 reveals its unique personality.

My Sound Impressions and Overall Sound Signature:

The M33 R2R doesn't sound like typical next generation DAPs. Its presentation is undeniably organic. Notes carry weight. Instrumental resonance feels natural. Transitions between frequencies flow effortlessly.

The M33 focuses on presenting music as a holistic whole, rather than emphasizing individual details. I feel this when listening to Sony as well.

I think I can best describe the overall sound signature as:

Natural, Organic, Smooth, Analog like, Broad, Non tiring

This is not a warm and hazy source. Nor is it an ultra analytical monitor.

The M33 R2R occupies a remarkably balanced middle ground where musicality and technical performance coexist comfortably.

What impressed me most was the feeling of comfort.

Complex recordings never feel cramped. Bright recordings rarely become harsh. Bad recordings remain listenable. And great recordings are addictive.

Pros: 

• Authentic R2R character with excellent implementation
• Natural and highly musical sound signature
• Outstanding mid range realism and vocal presentation
• Deep, textured, and convincing bass response
• Smooth, fatigue free treble performance
• Excellent NOS mode implementation
• Powerful Android performance with Snapdragon 680
• Responsive user interface and modern software experience
• Desktop Mode with battery bypass function
• Excellent price/performance ratio compared to most portable R2R alternatives

Cons: 

• Listeners seeking maximum analytical detail may prefer Delta Sigma alternatives
• I would have preferred a volume wheel.
• The screen could have been better with OLED in sunlight. But it's still great.

>>> You can read the full comparative analysis here.

.

Beyerdynamic is launching its most fun IEM yet today.

Beyerdynamic has had a reputation for accuracy and quality for many years. You've probably seen their products frequently in professional sound studios – headphones with the same grey velvet pads worn by almost all sound recording artists.

Whether it's the legendary DT770, DT880, DT990, DT1770 PRO MKII, or the newer DT In Ear series, the company always strives to prioritize clarity, reliability, and professional monitor performance. The quality of materials and workmanship is quite high for the price. Today, I want to talk about their most fun DT30IE series.

The new DT 30 IE takes a slightly different approach than all previous Beyerdynamic IEMs, focusing more on entertainment. While remaining firmly rooted in Beyerdynamic's professional heritage, the DT 30 IE offers something rarely associated with the German manufacturer:

More entertainment and more everyday use.

These IEMs are so small and comfortable that I don't think you've ever encountered such a small shell before. Imagine a shell almost as small as the eartip itself. Even the large silicone ear tips I use look bigger than the shells. And with these oval shaped eartips, you achieve an incredible level of isolation. This allows you to listen to music easily isolated from the outside world.

This isn't a purely analytical monitor with a critical listening focus like other series. It's a special series with a rather V shaped tuning.

This isn't a surgical studio tool designed to dissect recordings like other series. It's the kind of IEM you'll want to pull out of your pocket and enjoy with music at any time of day, wherever you are. And the price is much more affordable than others. Only 119 Euros.

The DT 30 IE combines professional monitor fundamentals with a more engaging and energetic setup that makes listening enjoyable both on and off stage.

After spending a few weeks with the DT 30 IE, I think it's clear that Beyerdynamic designed this model to appeal not only to musicians and performing artists, but also to listeners who simply want to enjoy music.

And I think this decision might be one of the smartest moves the company has made in years.

The DT 30 IE was built with stage use in mind.

At its heart is an 11mm dynamic driver designed and manufactured in Germany. Unlike many modern IEM’s that rely on multiple balanced armature or hybrid driver configurations, Beyerdynamic again opted for a single dynamic driver approach. Because this sounds more holistic and less tiring.

This decision definitely benefits consistency. The driver is very well tuned.

Every frequency comes from a single acoustic source, which ensures excellent tonal consistency throughout the presentation.

Its body is compact, lightweight and extremely comfortable. Weighing just 2.7 grams on each side, the DT 30 IE is virtually invisible during extended listening sessions.

The IP54 certification provides an added layer of confidence for musicians, performance artists, and content creators who frequently work in challenging environments. Dust, sweat, and occasional moisture exposure are no longer a concern.

Combined with passive isolation up to 39 dB, the DT 30 IE feels like it was specifically designed for real world use. I love it.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Sound Analysis:

1- Bass Performance:

The first thing listeners will notice is the bass.

Unlike the more neutral and studio focused DT 70 IE, the DT 30 IE adopts a more energetic low frequency delivery. The sub bass goes surprisingly deep for a single dynamic driver at this price point.

Electronic music, in particular, gains a satisfying impact here.

The kick drums are impactful, conveying a convincing physicality. Modern pop recordings sound lively and engaging.

Most importantly, Beyerdynamic has avoided excessive mid bass blast while balancing entertainment with this IEM. The bass, despite its heightened presence, manages to remain controlled and disciplined. There's enough excitement to satisfy casual listeners, while maintaining sufficient accuracy for monitoring tasks. This balance is one of the DT 30 IE's greatest strengths.

2- Midrange Performance

The mid frequencies are slightly behind the bass and treble in a classic V shaped structure. However, vocals never feel distant. Male voices maintain excellent fullness and authority. Female vocals remain clear and energetic. Instrument separation is particularly impressive. Guitars, pianos, and strings occupy clearly defined areas within the mix. The natural tone of the dynamic driver also significantly contributes to the listening experience. Unlike some affordable hybrid designs, instruments sound believable and consistent.

Nothing feels artificial. Nothing feels disjointed. Despite the more entertainment focused setup, the presentation remains remarkably natural.

3- Treble Performance

Treble performance represents another area where the DT 30 IE differentiates itself from traditional Beyerdynamic patterns. There's plenty of energy. There's plenty of sparkle.

However, the presentation avoids the sharp peaks that some listeners have historically associated with the brand. Cymbals sound clear. Acoustic harmonics emerge naturally. Micro details are easily distinguishable.

Most importantly, the high frequencies add excitement without causing significant fatigue. Long listening sessions are comfortable. This is something that isn't always easily achieved with a V shaped tuning.

4- Soundstage and Imaging

For a compact soundstage monitor, the DT 30 IE creates an impressively wide presentation. The width exceeds expectations. The depth remains convincing. Layering performance is better than many listeners expect from an entry level professional monitor. Imaging accuracy is another standout feature. Musicians will appreciate how easily individual instruments can be found within a mix.

Audiophiles will enjoy the immersive and cohesive presentation.

The DT 30 IE may be the entry level monitor with the widest soundstage in Beyerdynamic's DT IE series.

Final Verdict

The DT 30 IE marks an interesting evolution in Beyerdynamic's IEM series. At this price, it seems more sensible than its more expensive competitors.

Beyerdynamic has finally managed to create an IEM that combines professional reliability with genuine listening pleasure, rather than aiming for absolute neutrality. As a result, they've produced a headset that performs equally well on stage, in the rehearsal room, and in everyday music sessions, and its quality is quite high for its price.

The V shaped soundboard delivers energy and excitement without sacrificing the known consistency and natural tone of the dynamic drivers. The bass is impressive, the mid frequencies are clear enough for monitoring tasks, and the highs provide brightness without being tiring.

What impressed me most was how versatile the DT 30 IE is. It scales beautifully with high quality sources like the FiiO M33 R2R and Sony NW ZX507, but also delivers convincing performance from compact players like the AP80 Pro Max. For musicians, content creators, and audiophiles looking for an affordable IEM that balances durability, isolation, and musical enjoyment, the DT 30 IE looks set to be one of the most compelling products of 2026.

Beyerdynamic Official Purchasing Link

Wearing Style	In ear
Operating Principle	Closed
Transmission Type	Wired
Remote	Without Remote
Nominal Impedance Headphones	18 ohms
Headphone frequency response	5 - 20,000 Hz
Nominal sound pressure level	137 dB SPL (1 mW / 1 kHz)
Sound Coupling To The Ear	In ear
Cable & Plug	1.4 m cable with MMCX connector and 3.5 mm 3-pin plug

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Beyerdynamic is launching its most fun IEM yet today.

Beyerdynamic has had a reputation for accuracy and quality for many years. You've probably seen their products frequently in professional sound studios – headphones with the same grey velvet pads worn by almost all sound recording artists.

Whether it's the legendary DT770, DT880, DT990, DT1770 PRO MKII, or the newer DT In Ear series, the company always strives to prioritize clarity, reliability, and professional monitor performance. The quality of materials and workmanship is quite high for the price. Today, I want to talk about their most fun DT30IE series.

The new DT 30 IE takes a slightly different approach than all previous Beyerdynamic IEMs, focusing more on entertainment. While remaining firmly rooted in Beyerdynamic's professional heritage, the DT 30 IE offers something rarely associated with the German manufacturer:

More entertainment and more everyday use.

These IEMs are so small and comfortable that I don't think you've ever encountered such a small shell before. Imagine a shell almost as small as the eartip itself. Even the large silicone ear tips I use look bigger than the shells. And with these oval shaped eartips, you achieve an incredible level of isolation. This allows you to listen to music easily isolated from the outside world.

This isn't a purely analytical monitor with a critical listening focus like other series. It's a special series with a rather V shaped tuning.

This isn't a surgical studio tool designed to dissect recordings like other series. It's the kind of IEM you'll want to pull out of your pocket and enjoy with music at any time of day, wherever you are. And the price is much more affordable than others. Only 119 Euros.

The DT 30 IE combines professional monitor fundamentals with a more engaging and energetic setup that makes listening enjoyable both on and off stage.

After spending a few weeks with the DT 30 IE, I think it's clear that Beyerdynamic designed this model to appeal not only to musicians and performing artists, but also to listeners who simply want to enjoy music.

And I think this decision might be one of the smartest moves the company has made in years.

The DT 30 IE was built with stage use in mind.

At its heart is an 11mm dynamic driver designed and manufactured in Germany. Unlike many modern IEM’s that rely on multiple balanced armature or hybrid driver configurations, Beyerdynamic again opted for a single dynamic driver approach. Because this sounds more holistic and less tiring.

This decision definitely benefits consistency. The driver is very well tuned.

Every frequency comes from a single acoustic source, which ensures excellent tonal consistency throughout the presentation.

Its body is compact, lightweight and extremely comfortable. Weighing just 2.7 grams on each side, the DT 30 IE is virtually invisible during extended listening sessions.

The IP54 certification provides an added layer of confidence for musicians, performance artists, and content creators who frequently work in challenging environments. Dust, sweat, and occasional moisture exposure are no longer a concern.

Combined with passive isolation up to 39 dB, the DT 30 IE feels like it was specifically designed for real world use. I love it.

* * * To read the full review, including source matching and comparisons with other IEMs, click here.

Sound Analysis:

1- Bass Performance:

The first thing listeners will notice is the bass.

Unlike the more neutral and studio focused DT 70 IE, the DT 30 IE adopts a more energetic low frequency delivery. The sub bass goes surprisingly deep for a single dynamic driver at this price point.

Electronic music, in particular, gains a satisfying impact here.

The kick drums are impactful, conveying a convincing physicality. Modern pop recordings sound lively and engaging.

Most importantly, Beyerdynamic has avoided excessive mid bass blast while balancing entertainment with this IEM. The bass, despite its heightened presence, manages to remain controlled and disciplined. There's enough excitement to satisfy casual listeners, while maintaining sufficient accuracy for monitoring tasks. This balance is one of the DT 30 IE's greatest strengths.

2- Midrange Performance

The mid frequencies are slightly behind the bass and treble in a classic V shaped structure. However, vocals never feel distant. Male voices maintain excellent fullness and authority. Female vocals remain clear and energetic. Instrument separation is particularly impressive. Guitars, pianos, and strings occupy clearly defined areas within the mix. The natural tone of the dynamic driver also significantly contributes to the listening experience. Unlike some affordable hybrid designs, instruments sound believable and consistent.

Nothing feels artificial. Nothing feels disjointed. Despite the more entertainment focused setup, the presentation remains remarkably natural.

3- Treble Performance

Treble performance represents another area where the DT 30 IE differentiates itself from traditional Beyerdynamic patterns. There's plenty of energy. There's plenty of sparkle.

However, the presentation avoids the sharp peaks that some listeners have historically associated with the brand. Cymbals sound clear. Acoustic harmonics emerge naturally. Micro details are easily distinguishable.

Most importantly, the high frequencies add excitement without causing significant fatigue. Long listening sessions are comfortable. This is something that isn't always easily achieved with a V shaped tuning.

4- Soundstage and Imaging

For a compact soundstage monitor, the DT 30 IE creates an impressively wide presentation. The width exceeds expectations. The depth remains convincing. Layering performance is better than many listeners expect from an entry level professional monitor. Imaging accuracy is another standout feature. Musicians will appreciate how easily individual instruments can be found within a mix.

Audiophiles will enjoy the immersive and cohesive presentation.

The DT 30 IE may be the entry level monitor with the widest soundstage in Beyerdynamic's DT IE series.

Final Verdict

The DT 30 IE marks an interesting evolution in Beyerdynamic's IEM series. At this price, it seems more sensible than its more expensive competitors.

Beyerdynamic has finally managed to create an IEM that combines professional reliability with genuine listening pleasure, rather than aiming for absolute neutrality. As a result, they've produced a headset that performs equally well on stage, in the rehearsal room, and in everyday music sessions, and its quality is quite high for its price.

The V shaped soundboard delivers energy and excitement without sacrificing the known consistency and natural tone of the dynamic drivers. The bass is impressive, the mid frequencies are clear enough for monitoring tasks, and the highs provide brightness without being tiring.

What impressed me most was how versatile the DT 30 IE is. It scales beautifully with high quality sources like the FiiO M33 R2R and Sony NW ZX507, but also delivers convincing performance from compact players like the AP80 Pro Max. For musicians, content creators, and audiophiles looking for an affordable IEM that balances durability, isolation, and musical enjoyment, the DT 30 IE looks set to be one of the most compelling products of 2026.

Beyerdynamic Official Purchasing Link

Wearing Style	In ear
Operating Principle	Closed
Transmission Type	Wired
Remote	Without Remote
Nominal Impedance Headphones	18 ohms
Headphone frequency response	5 - 20,000 Hz
Nominal sound pressure level	137 dB SPL (1 mW / 1 kHz)
Sound Coupling To The Ear	In ear
Cable & Plug	1.4 m cable with MMCX connector and 3.5 mm 3-pin plug

.

I've heard about this IEM from many friends before. They said I absolutely had to listen to it. Curious, I bought one, and now I'll try to tell you about this impressive IEM.

We're in a market full of hybrid IEMs that create illusions of detail by relying on excessive bass frequencies, aggressive upper mid frequencies, or artificially boosted trebles. The ZiiGaat Crescent has a tonality comparable to that found in more expensive IEMs, and it manages to impress the listener with its sound quality.

*** To read the complete source matching and comparative review with other IEMs, click here.

This is a 2xDD + 2xBA configuration with a truly serious tuning. It's a meticulously tuned IEM designed by people who truly understand what makes long term listening enjoyable. Linsoul has once again managed to shake up the market.

The Crescent is built on an advanced four driver architecture.

1× 10 mm PET Dynamic Driver: This dynamic driver features a PET diaphragm tuned for mid bass warmth.

1× 10 mm LCP Dynamic Driver: This dynamic driver features an LCP diaphragm optimized for sub bass response.

1× Knowles 30262-163: Composite dual balanced armature driver for upper mid frequencies and clarity.

1× Knowles 33518: Dual unit balanced armature tweeter offering extended high frequencies.

On paper, the driver configuration looks impressive. But in practice, what really matters is how these components are integrated. I think countless manufacturers have used expensive Knowles drivers only to produce disjointed and inconsistent tunings. ZiiGaat, thanks to its experienced sound engineers, does these drivers justice.

I believe the Crescent has one of the most refined and complete tunings currently available in this price range. After using it for a long time on multiple digital audio players and portable sources, I can confidently say that its tonal balance is among the best tuned IEMs in its entire category.

The first thing that struck me was its ability to deliver an energetic sound without becoming tiring, even during long sessions. The bass is powerful but disciplined. The mid frequencies are distinct and natural. The treble is broad and airy without becoming sharp.

Most importantly, the entire frequency response feels connected from start to finish. There are no noticeable transitions between the drivers. No awkward tonal shifts. There's no feeling that the bass, mids, and treble are coming from separate acoustic systems. Crescent sounds like a single, complete transducer.

*** To read the complete source matching and comparative review with other IEMs, click here.

Pros: 

One of the best tuned IEMs currently available in its price category
Exceptional tonal balance between musicality and technical performance
Outstanding consistency despite using four drivers
Deep and powerful sub bass with excellent control
Rich and natural vocal presentation
Smooth upper mid frequencies that avoid shouting
Refined highs with impressive extension and airiness
Excellent long term listening comfort
Lightweight ergonomic resin bodies
Very good passive isolation
Scales noticeably with higher quality sources
Wide soundstage with strong depth and layering
Precise imaging for its price class
Easily driven from portable devices
Includes modular connection options for both 3.5mm and 4.4mm outputs
Excellent price performance ratio

Cons: 

The stock cable could have felt better and more premium
Listeners seeking an aggressive analytical presentation might want more high frequency emphasis

Ziigaat Crescent Official Link

.

I've heard about this IEM from many friends before. They said I absolutely had to listen to it. Curious, I bought one, and now I'll try to tell you about this impressive IEM.

We're in a market full of hybrid IEMs that create illusions of detail by relying on excessive bass frequencies, aggressive upper mid frequencies, or artificially boosted trebles. The ZiiGaat Crescent has a tonality comparable to that found in more expensive IEMs, and it manages to impress the listener with its sound quality.

*** To read the complete source matching and comparative review with other IEMs, click here.

This is a 2xDD + 2xBA configuration with a truly serious tuning. It's a meticulously tuned IEM designed by people who truly understand what makes long term listening enjoyable. Linsoul has once again managed to shake up the market.

The Crescent is built on an advanced four driver architecture.

1× 10 mm PET Dynamic Driver: This dynamic driver features a PET diaphragm tuned for mid bass warmth.

1× 10 mm LCP Dynamic Driver: This dynamic driver features an LCP diaphragm optimized for sub bass response.

1× Knowles 30262-163: Composite dual balanced armature driver for upper mid frequencies and clarity.

1× Knowles 33518: Dual unit balanced armature tweeter offering extended high frequencies.

On paper, the driver configuration looks impressive. But in practice, what really matters is how these components are integrated. I think countless manufacturers have used expensive Knowles drivers only to produce disjointed and inconsistent tunings. ZiiGaat, thanks to its experienced sound engineers, does these drivers justice.

I believe the Crescent has one of the most refined and complete tunings currently available in this price range. After using it for a long time on multiple digital audio players and portable sources, I can confidently say that its tonal balance is among the best tuned IEMs in its entire category.

The first thing that struck me was its ability to deliver an energetic sound without becoming tiring, even during long sessions. The bass is powerful but disciplined. The mid frequencies are distinct and natural. The treble is broad and airy without becoming sharp.

Most importantly, the entire frequency response feels connected from start to finish. There are no noticeable transitions between the drivers. No awkward tonal shifts. There's no feeling that the bass, mids, and treble are coming from separate acoustic systems. Crescent sounds like a single, complete transducer.

*** To read the complete source matching and comparative review with other IEMs, click here.

Pros: 

One of the best tuned IEMs currently available in its price category
Exceptional tonal balance between musicality and technical performance
Outstanding consistency despite using four drivers
Deep and powerful sub bass with excellent control
Rich and natural vocal presentation
Smooth upper mid frequencies that avoid shouting
Refined highs with impressive extension and airiness
Excellent long term listening comfort
Lightweight ergonomic resin bodies
Very good passive isolation
Scales noticeably with higher quality sources
Wide soundstage with strong depth and layering
Precise imaging for its price class
Easily driven from portable devices
Includes modular connection options for both 3.5mm and 4.4mm outputs
Excellent price performance ratio

Cons: 

The stock cable could have felt better and more premium
Listeners seeking an aggressive analytical presentation might want more high frequency emphasis

Ziigaat Crescent Official Link

.

I've heard about this IEM from many friends before. They said I absolutely had to listen to it. Curious, I bought one, and now I'll try to tell you about this impressive IEM.

We're in a market full of hybrid IEMs that create illusions of detail by relying on excessive bass frequencies, aggressive upper mid frequencies, or artificially boosted trebles. The ZiiGaat Crescent has a tonality comparable to that found in more expensive IEMs, and it manages to impress the listener with its sound quality.

*** To read the complete source matching and comparative review with other IEMs, click here.

This is a 2xDD + 2xBA configuration with a truly serious tuning. It's a meticulously tuned IEM designed by people who truly understand what makes long term listening enjoyable. Linsoul has once again managed to shake up the market.

The Crescent is built on an advanced four driver architecture.

1× 10 mm PET Dynamic Driver: This dynamic driver features a PET diaphragm tuned for mid bass warmth.

1× 10 mm LCP Dynamic Driver: This dynamic driver features an LCP diaphragm optimized for sub bass response.

1× Knowles 30262-163: Composite dual balanced armature driver for upper mid frequencies and clarity.

1× Knowles 33518: Dual unit balanced armature tweeter offering extended high frequencies.

On paper, the driver configuration looks impressive. But in practice, what really matters is how these components are integrated. I think countless manufacturers have used expensive Knowles drivers only to produce disjointed and inconsistent tunings. ZiiGaat, thanks to its experienced sound engineers, does these drivers justice.

I believe the Crescent has one of the most refined and complete tunings currently available in this price range. After using it for a long time on multiple digital audio players and portable sources, I can confidently say that its tonal balance is among the best tuned IEMs in its entire category.

The first thing that struck me was its ability to deliver an energetic sound without becoming tiring, even during long sessions. The bass is powerful but disciplined. The mid frequencies are distinct and natural. The treble is broad and airy without becoming sharp.

Most importantly, the entire frequency response feels connected from start to finish. There are no noticeable transitions between the drivers. No awkward tonal shifts. There's no feeling that the bass, mids, and treble are coming from separate acoustic systems. Crescent sounds like a single, complete transducer.

*** To read the complete source matching and comparative review with other IEMs, click here.

Pros: 

One of the best tuned IEMs currently available in its price category
Exceptional tonal balance between musicality and technical performance
Outstanding consistency despite using four drivers
Deep and powerful sub bass with excellent control
Rich and natural vocal presentation
Smooth upper mid frequencies that avoid shouting
Refined highs with impressive extension and airiness
Excellent long term listening comfort
Lightweight ergonomic resin bodies
Very good passive isolation
Scales noticeably with higher quality sources
Wide soundstage with strong depth and layering
Precise imaging for its price class
Easily driven from portable devices
Includes modular connection options for both 3.5mm and 4.4mm outputs
Excellent price performance ratio

Cons: 

The stock cable could have felt better and more premium
Listeners seeking an aggressive analytical presentation might want more high frequency emphasis

Ziigaat Crescent Official Link

.

When I first picked this up to review, believe me, I didn't take it very seriously. Because of its size and light weight, you never expect such sound quality. But the build quality, despite the price, is always up to the standard of the German Beyerdynamic we know.

The DT270 PRO, quietly introduced to the professional audio market, largely remained under the radar among audiophiles. However, after spending a significant amount of time with this compact monitor, I've come to a surprising realization.

I can say this is the most intelligently tuned closed back headset Beyerdynamic has ever produced. At this price, it's the best in the world.

The Beyerdynamic DT270 PRO seems to have been created for professionals who spend their entire workday wearing headphones and who, above all, demand accuracy, comfort, reliability, and consistency.

What makes the DT270 PRO particularly captivating is that it remains surprisingly enjoyable in terms of listening to music while achieving these goals. As an audiophile, I didn't expect to like a headset sold at this price point so much because it truly has an impressive sound character.

This is definitely a headset that quietly bridges the gap between professional monitoring and everyday music enjoyment. It's not as precise as a DT1770 Pro MKII, of course, but it's a lot of fun.

After extensive listening sessions across multiple sources, genres, and work environments, I believe the DT270 PRO deserves far more recognition than it currently receives.

*** You can read the full review and comparative - detailed audio analysis here.

My First Impressions:

At first glance, the DT270 PRO looks almost understated. There's no flashy industrial design. No oversized earcups.

No luxurious materials designed purely for visual appeal.

Everything about the headset feels purposeful. Each component seems to fulfill a functional role. This approach perfectly reflects Beyerdynamic's professional heritage.

The DT270 PRO is designed for broadcasters, content creators, sound engineers, podcasters, video editors, and recording professionals who require reliable performance throughout long work sessions.

But beneath this practical exterior lies a highly sophisticated acoustic design.

Build Quality and Comfort:

One of the DT270 PRO's strongest points is its comfort. Okay, maybe those with large ears might not be as comfortable, but it's definitely ideal for people with average or small ears.

Significantly lighter than many competing studio headphones, this entry level professional headset felt almost invisible during extended use.

The compression force strikes a perfect balance between security and comfort, and doesn't cause pain or pressure (of course, this may vary from person to person). The ear cushions provide a reliable seal without creating excessive pressure. The material is the familiar Beyerdynamic Velour quality and is incredibly soft.

The build quality is equally impressive.

With a robust and reliable construction, the headset also offers a lightweight profile that makes daily use effortless.

Unlike many modern products designed according to disposable consumer trends, the DT270 PRO feels like it's designed for years of professional service.

In fact, this is exactly what many studio professionals need: practical and lightweight.

Cable:

The 3.5mm cable and the single connector on the earphone provide considerable flexibility. It's worth noting that there are sockets on both earphone ends, allowing you to plug it in wherever you prefer. It's also a great touch that it comes with a 6.35mm and 3.5mm to Type C conversion adapter.

This is a very professional connection. The cable quality is quite high, and I found its flexible, coiled design very convenient. I only wish it had a 4.4mm interchangeable connector.

Source Matching and Efficiency

One of the most impressive features of the DT270 PRO is its efficiency.

Unlike many traditional studio monitors, it didn't require powerful amplification to function properly. It scaled quite comfortably with the portable DAC amplifiers I have (I tried it with the Questyle M15i and Campfire Audio Relay DAC Amps).

I also got quite satisfactory results with the Sony ZX507 and TempoTec V3 Blaze DAPs, and with a Macbook Pro and an iPhone 14 Pro Max. (By the way, the iPhone had a DAC amp attached)

The DT270 PRO is an extremely easy to drive headset, making it one of the most versatile monitor headsets currently on the market at this price point.

While better sources reveal additional detail and improved dynamics, the headset retains its basic character even with modest equipment.

This consistency is extremely valuable in professional environments.

*** You can read the full review and comparative - detailed audio analysis here.

Pros: 

Excellent tonal balance
Natural and highly accurate midfrequencies
Smooth and non fatiguing highs
Exceptional long lasting comfort
Easily driven from portable sources
Excellent speech and vocal reproduction
Professional grade build quality
Very good imaging performance
Suitable for both work and music listening
Lightweight and portable

Cons: 

Not designed for detail enthusiasts, but successful. 
Less dramatic presentation compared to some competitors
Limited audiophile recognition compared to flagship models
I wish it came with a cable with a 4.4mm socket.

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