Amplifier for distributed bass array

Maybe some AIYAMA A07s?
And the wall plug larger power supply?

You would need 2 for 4 channels and the AIYAMA go pretty high in wattage, but the heat could load up if it is slamming for a long time.

My daughter just put one in to feed some Sony bookshelf speakers.

They seem like they a not bad for a blue collar amp, but I have not heard them except for a short video I got sent.
The specs are like some 80+ dB SNR… So there are better and there are cheaper, but nothing at that SNR is that is as good and cheaper, nor better at the same price. You need to go to Topping PA3s, and the price doubles and the wattage drops. They would have been better for a booked shelf speaker, but not for a small sub (IME)

A few years back I started using Behringer 6 and 12K amps along with DCX2496. I've never looked back. I've tried a few amps too. :-) 12K are almost 30 pound of class Ds. #10 wire inside the amp with breakers, not stick fuses. ++ for me.

Dear @blue_collar_audio_guy  : I don't have experiences with amps to handled those four stand alone woofers.

I said woofers when you posted and mentioned subwoofers that those units in rality are not. In the best condition could go down to 30hz +,- 3db.

Anyway, good luck with your amp hunt.

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

If it were me I'd go with something very simple, if I 100% wanted to keep the DSP out of the subwoofer:

I use Dayton Audio woofers as well for my DBA and use Class AB amps, namely a Acoustat TNT-200 or Electron Kinetics Eagle 2C. I have also used Bel Canto Class D monoblocks. Really you don't need anything too expensive and just need something that gives you adequate damping.

I use Dayton Audio woofers as well for my DBA and use Class AB amps

Nice. I need it to be 2 ohm stable with the way the subs will be wired and that’s another issue altogether. That takes the Dayton out of the picture and many others. Been looking at a recapped Adcom 555. Beefy power supply and 2 ohm stable.