I just recently installed 2 amps to power my components, and 1 amp to power my single 12. The 2 amps I have powering my components are Hifonics 400 2-channel amps. The amp I have powering my sub is a alpine mrp-m500. When the bass hits the lights dim. I know I should probably upgrade alternator. Do you guys think im running too much power harming my alternator?