MCM has fidek amps in their clearance bin. Are they any good? The info no them is pretty limited, but they seem to have pretty good build. I am looking at the 400watt/ch model, even the 300watt look good for the price. It states 400watts/channel rms but does not list the freq range. How noisy are their fans? Are they good to power up subs? Besides some SVS chatter, not much info over the internet.