My Alienware 16 Area-51 AA16250 16" Gaming Laptop
Turns off the LCD as soon as I plug in any kind of power. This happens before Windows boot so I don’t think it’s a driver issue. Anyone experienced this before or know a fix ?
Hey all,
I’m working on a pair of shallow on-wall surround speakers for my home theater and wanted a sanity check on the acoustic side before I start cutting MDF.
I’m not too worried about the cabinet layout at this point. The packaging is tight, but workable. What I’m mainly trying to validate is whether this alignment is actually likely to hit my target and sound decent, or if I’m missing something obvious before I order parts.
These will be surround speakers crossed around 80 Hz in the AVR. I’m not trying to build tiny full-range mains, but I do want useful extension into the mid-50s so the surrounds are not completely dependent on the sub for every low-frequency effect.
The design is meant to be shallow, wall-friendly, and clean-looking while still having real output capability.
Active driver:
Passive radiators:
I chose the coax because these are surrounds and the listening positions will be all over the place off-axis. I chose dual PRs because a port in a shallow enclosure feels like a compromise, and the passive radiator area gives me more excursion headroom than a single PR.
The cabinet is about 12.5 L net.
Using the published T/S parameters, my sim with the stock PR mass lands here:
Adding 5–10 g per PR flattens the response a little and buys a couple Hz, but stock mass looks like a reasonable starting point.
My current plan is to build one test cabinet, run impedance sweeps, confirm the actual tuning, and only add PR mass if the measured alignment calls for it.
I’m going to start with the published Madisound / SB Acoustics PFC coaxial crossover, specifically the SB16 version with the 1.5 ohm tweeter padding.
Crossover PDF: https://www.madisoundspeakerstore.com/pdf/SBAcoustic_PFC_Coaxial_Crossover_Designs.pdf
That said, I’m not treating the published crossover as final. Once the cabinets are built, I’ll measure the drivers in the actual baffle and intended placement, then tune the crossover myself in VituixCAD.
VituixCAD: https://kimmosaunisto.net/
Since these are shallow on-wall speakers, I expect the real response to need some adjustment compared with a generic/reference crossover.
I’m mainly looking for feedback on whether this design seems realistic acoustically.
The target is an 80 Hz-crossed surround that can still reach into the mid-50s cleanly enough to feel substantial. Based on the sim, the dual-PR alignment looks workable, but I’d like to hear from anyone who has used this coax, these SB passive radiators, or a similar shallow on-wall PR alignment.
The main things I’m trying to catch are feasibility issues: PR tuning that looks better in sim than it behaves in the real world, output limits around the 60–100 Hz range, or any known problems with this coax when used as a surround in a shallow enclosure.
Parts budget is roughly $400–450 for the pair before wood. This is part of a larger DIY home theater speaker project, and the surrounds are the last design I’m trying to settle before ordering parts.
Happy to post the sim plots if useful.