Hello, I am getting a car audio system, will run about 1750-2000 watts RMS at 4 OHMS. It is composed of 2 amplifiers. I was wondering what kind of alternator I would need to upgrade to (how many amps?) Also would it make a difference to get a deep cycle battery, and if so could you recommend one? I am new to car audio and dont understand too much! Thanks, all answers appreciated.