I just recently purchased 4 RLP 15's. This is my first SoundSplinter purchase. I bought the dual 4 ohm version. I have a enclosure built that is 13.14 cubic feet NET volume.All 4 subs share the same 13.14 cubic foot chamber. The port is 6x 24 with a length of 18" tuning it to roughly 31.5 hz. These will be fed by a hifonics colossus. My options are to give each sub 750 watts each or 600 watts each. With each sub seeing 3.2 feet will I be over powering them?? Any suggestions would be helpful. I can easily slug the box if needed. Also, any thoughts on all 4 subs all sharing the same air space? This is for a LSQ daily driver with a emphasis on lower octaves. "I mainly listen to bass cd's and rap" Thanks!!!!!