I've finnaly got my sub installed. It sounds awesome when I play stuff like Eminem, but when I throw in the best of the best....Metallica. It doesn't sound how I would like. I've played with the HU settinga and the amp settings. Is there something I could do to make it sound better? It just doesn't seem like it's hitting fast enough or something. I have two 10's in a bandpass enclosure. Subs are 500w and so is amp. Thanks for any help.