I just built this 1 cubic foot sealed box and I'm not getting as much punch as I had hoped for. It's an RF P3D212 sub (4-ohm to amp) and a Kenwood KAC-9104D amp. I have the sub mounted on top of thin carpet, it felt like it pulled down to seal, but maybe not?
Sub rates 500 RMS, 1000 peak.
Amp...