2200 watts in system. Do I need a high output alternator?

I HAVE A 96 MUSTANG, 3.8L V6. JUST RECENTLY BOUGHT A NEW DURALAST GOLD BATTERY. I AM GONNA HAVE A JBL GTO 14001 (1500W RMS) FOR 2 12" KICKER L7, AND A JBL GTO 1004 (660 W RMS) FOR MY HIGHS, DO I NEED A HIGH OUTPUT ALTERNATOR????? OR JUST GET A REALLY GOOD BATTERY???? ANY ANSWER IS APPRECIATED. OR RECOMMENDATIONS AS WELL.