I was out working on my car and had the Radio going after about an hour I went to start the car and no go, battery dead as. I have a 4 Channel Power Amp (4x65watts) hooked up, do I need a bigger battery?
yeah. that'd prolly do it. and a bigger battery might help, but my only real recommendation is that you don't run your amp with out the car running for very long. without the engine on, the alternator isn't chargeing the batteries, which means they go dead.