Ill admit im basically a noob when it comes to the three topics in the thread title. I was looking into a slightly larger amp then what I have to get the most out of the subs I will choose. Im thinking of doubling my current amps wattage if not almost tripling it. On a stock alternator with 0ga wiring what would i be up against if I were to install a D3100 in the trunk? I guess what are my limits? I dont blast my music and if I do it would be around a minute tops. I understand my stock 120amp alternator will be my limiting factor. How long can it take before a 2-3k watt amp drains a group 31 battery?