I thought i would do a review for this amp because i haven't seen it here in the forums well not yet at least. Until now im running this amp on a pair of alpine sps-600 although was a diffrent comp set before. This amp is a very nice amp it's well worth the cash. I love the way the gain is setup and how the crossover is basically built into the back of the amp. It is basically a hz chip that is in the back of the amp when ordering you can ask what hz chip you want. you can get these amp's through audiomaster here on the forums. A really good guy and well to work with. This amp though is great very clear clarity and also. One amp i would highly suggest to all you sq and sql guy's also especially.