Hey everyone, I'm new to this forum, and I've got a problem with an installation which I think might be the CD player. I'm installing a couple of 12" Sony Xplod 800W subs (which are brand new and do work) in my buddy's car, and he's got a Sony CDX-M8800 head unit with two mono sub outputs on the back which may not be working. He bought a Cuspid 1600W amp (which I told him was not that great) and we've got everything in the car, hooked up, but we're getting no bass through the subs. The amp works because we tried in my car, and the wiring is fairly simple as far as installations go. I'm no expert because this is only my third installation, but the only thing I can figure is there is something wrong with the sub output in the head unit, or perhaps it just doesn't like the amp? When the player is turned on, the other speakers work and we do get a very faint hum from the subs, but no music. If anyone has any idea as to what the problem is and hopefully a solution, we'd both appreciate it. Thanks