Hey guys I just bought a bunch of gear to install in my 04 cadillac cts and I don't know if it will be able to fully power the two amps that I have. The two amps i bought are the rockford fosgate r1200-1d and a alpine mrp-f300. My alternator is rated at 120 amps and my battery is a duralast 78-dl. I don't want to get a cap so I'm guessing I might need to upgrade my battery or alternator. Can I get some advice on what I should do?