infinity digital 100. Apparently these are somewhat highly valued amps. This works well, and has all of the plugs. the only thing that is a little off on this one is that when i adjusted the gain, the sub would move a little and then go back to its normal position. Not sure what that means, but it works really well. I have gotten a few comments that it is probably just a dirty pot on the gain knob. Kinda scratched, but it works!