I am going to be purchasing a JBL 1200.1 either today or tomorrow. I am slightly concerned about power issues however. I have a stock alternator and a stock battery. Does this amp pull a lot of power? Would it be wise for me to purchase and install a new alternator or batter as well? If it's possible I would like to avoid installing new car parts since I don't really plan on having my current vehicle for much longer. Thanks for the help.