Report "Amp overheats I bought this amp used and the amp overheats after about 15min everytime i used it, checked groud, changed to bigger power wire and gound and still does it, took it to a speaker shop and they checked with a meter and said that is was getting plenty of juice from battery. is the amp just bad. I finally chenged to lightning audio 150 watt amp, but I would like to use the MTX"