I have SW800's and drive them using a Kinergetics KBA75 (100w Class A). If you want something small to hide behind the subs, look at the Meitner MTR101 mono blocks. BTW, how did you decide you needed at least 300 watts?
NUFORCE AMPS FOR PASSIVE SUBWOOFERS
I need a pair of small mono amps that I can hide behind my subs(Kinergetics SW-800), I can leave on, don't get hot and have alot of power to drive and control the six 10" woofers per side. Are the Nuforce up to the challange or should I be looking elsewhere?! I would like at least 300watts or better per channel. The subs a 4ohm. Thanks for any info!