I get really good bass with some songs. The song i get good bass with are Lil Flip Game over and most of the cd then i put in the new Eminem and the bass is almost none existent. I have the amp on LPF, the sub sonic to a 1/4, the bass to a 1/2, the level on 1/3 and the lpf to 1/2. I get very good bass on the TI anf LiL Flip cd no matter how i tune the amp but nothing really on the eminem CD the new one. I have 2 12" audibahn AW12SE and a kole audio HK620-2 . Can Anyone help.