u/Character_Plenty_853

I think I’ll hold on to this setup for the rest of my life, these were meant to be together, Boston Acoustics A400 4ohms bi-amped with the lows driven by the CR2020 and highs by the CA1000 on class A at all times, possible with a set of fans underneath on both units and controlled by a thermostat (that little square screen near the iPad on top left corner).

Custom light beige fabric really making the A400’s blend well with the space, ah, and in case you’re wondering I’ve added an RBG led strip to the CR2000, can pick any color.

Both amps are touching each other on purpose, to grow the idea of making a custom single wood case to make it look like it’s all a single unit.

I’m probably upsetting a lot of purists out there, but hear me out, why not just a giant Yamaha bi-amping the Boston Acoustics 400’s, aesthetically….I like it, I’ll let arranged like that for some time, if it’s a permanent go, I’ll start making a giant custom wood case with the original vent grills on top, it will look like a single unit 😁

And before you give me crap about the polk S35, I know they suck as a center speaker alone, but here…it’s not the case, I’m running phantom center with the main towers + the S35 with a speaker switch to recenter the dialog for someone not seated in the sweet spot 😉

This is a blend of Stereo two channel and home theater 9.1

Thought I’d share some of my findings, originally from simply getting to know more about my equipment, and interested in confirming if adding fans to this unit could make any difference. I got a simple thermometer with the sensor located at the hottest spot I could identity, placed two sensors for left and right. Ran a couple of test in different modes, specially interacting Class A (notorious for reaching extreme temperatures) with the fans. As someone pointed online, by placing the fans this close from the heatsink, I could run into the problem of melting the blades! So what I did was directing the airflow from outside to in, at all times, this way is always keeping the heat away.

-Ambient temp: 65.5F
-All units in Fahrenheit

No wood case
No fans
No speakers
Normal operation: 77.4 / 79.2
CLASS A: 138.7 / 140.5

With wood case
No fans
No speakers
Normal operation: 93.6 / 91.6
Class A: 151.3 / 153

With wood case
Quad fans airflow out to in
No speakers
Normal operation: 77.7 / 77.4
CLASS A: 105.1 / 106.9

With wood case
Quad fans airflow out to in
8 ohms speakers
Normal operation: 83.8 / 87.4
CLASS A: 115.2 / 115.7

$7 blackout curtain from the thrift store…stripped away the blackout part only leaving the thin fabric, enough to cover 2 sets of speakers! ….and yes, it’s very much acoustically transparent, boy that looks WAY better than just a boring OEM black!

Finally found the flagship A400 to join as the matching set with the same fabric upgrade. I’ll have to ship the speakers from another state, wish me luck on that, fingers crossed 🤞