I bought a PG 1200.1 from my buddy he had 3 15s hooked up with just one PG 1200.1 and he was push about 1510.2 watts when tested with just one Pg and a 4 chanel amp. My buddy told me i could use just the PG 1200.1 to push 4 12 inch hifonics brutuss. Each one is 1200 Wats MAXX 600 W RMS. should i buy 1 more PGs to push the subs the right way or just use one?