I am in the middle of building a class D project. It started off with a 41hz.com amp32, which sounded great but simply wasnt loud enough for the application, for home use it would have been excellent. That hasnt been swapped out and a Amp11, over a 70 watts 0.003 % THD into 4 ohm. Thats should be loud enough and all runs off a couple of SLA batteries.