I need a high powered monobloc capable of driving 4 Ohm load (subwoofer driver) At least 500W into 4 Ohm, low distortion. Anyone got a monobloc with that spec? I'm just enquiring for now, as I need to find out if lots of people have enough around, otherwise I'll order a new amp. Not sure if a poweramp with a gain control reduces sound quality, but would be useful if the mobobloc has one- or maybe a -10dB, 0, +10dB switch will do. Cheers.