I have a Onkyo PR-SC5508 preamp + PA=MC5500 powe amp 250w RMS @ 4Ohms. JAMO D7 400W @4Ohm speakers x9 as the amp is 9.2 and a Kreisel Design DXD 1500w RMS subwoofer, so plenty of grunt... I guess I was looking for something even louder and deeper, but I think unless I want to part with 2k or more I won't get that type of sound...