Hi I have owned a power acoustik 0V2 820 stereo amp for a little over a year now and it seems to have stopped working. I am looking at memphis mono amps such as the MC500 D to replace it and was wondering if this is a better subwoofer amp than my old power acoustik? In other words are memphis amps considered to be pretty good for the money and do they put out their rated amount of power? Thanks for any replies.