I just got one 12" W6 sub from a friend (not V2), but I don't have an amp for it. He was running a Rockford Fosgate Power 250M amp, but I think that is underpowered. I have been hearing about JL's own 500/1 or 1400d amps. The only thing besides the obvious that I am concerned about, such as sound quality and what not, is that the amp has a gain knob and around the 2 - 300 price range. CAN ANYONE PLEASE HELP WITH ANY TYPE OF AMP??