I've decided to replaced my 2001 jeep wrangler factory subwoofer again. (Previous setup was a JL6.5 and a sony mono amp, ran pretty okay.) I purchased a kicker CVT65 that handles 150 watts RMS at 4 OHM. I paired it with a kicker ZX300.1 that pushes 300 watts RMS at 2 OHM. The factory box is...