truf read my thread!!!!! ive used both! 9 cubes at 40hz would be the best for the sd 2.5's. the sd's will shat on l7s, i know first handWith the power teh Audioques will kill the kickers and sound better doing it.
well i hate to brake it to you but he is supper underpowering those L7 if all he has is a 1500d on it.will the sdc 2.5 15"s in about 10cubes @ 35htz get as loud as two L7 15"s in 8cubes on same amp? cause dude in town has that L7 setup and its loud as piss