Lets see I have a Jbl Bp1200.1 I just ordered a Kicker Comp Vr 15" So I will Run it at 4 Ohms For 600 Watts Rms Untill I get the 2nd Comp Vr 15" Then will run them 2 ohms for 1200 Watts Rms Each subwoofer is rated at 500 Watts rms If I don't blast up the volume 100 watts more rms wouldn't hurt them Correct? Also How much difference would goin from 1 15 to 2? BTw They will be in a sealed box.
Shouldn't hurt, but remember the 1200.1 is underrated. You could turn the gain down or cut the subs from the head unit. Just try not to kick bass boost way up. My friend has two Audiobahn natural excursion 10"s (ugh, sound like sh*t) 400W RMS each, off a JBL 1200.1 and unfortunately they're still bumping. Should see about +3db from another sub.