ok so iam goin 2 rebuild my single 4.153cuft box its goin 2 b 13h x 33.5w x 21d for 2 12inch older kicker cvrs they will b sharin a 4inch wide port same box like (b) an it will b tuned @ 27hz any an it will b power by a kennwood 600w true power of it is 448W any ?s