ok have a jbl bp 1200 and i just picked up 2 cerwin vega vmax 15s. They are rated at 400 watts and are dual 4 ohm, so i can wire them up to 4 or 1 ohm, the 4 ohm is 600 watts, and the one ohm is 1200 or more. The subs are in a 4 cube sealed box....need opinions thanks