i have two l5 15 and a vented 4.5 cft box and a sealed 2.5 when i hoked them up in the sealed box they botem out a lot sound as if they will blow but in the ported they get sloppy? ihave a 1600 ppi pcx running them. any one know that i am doing wrong? what should i tune them to? or that ever i dont know? i just dont like the sound.