I have a used cruch P125 amplifier.The specs are available on line I have replaced all the outputs and all the power supply fets.I have upgraded the power supply fets and put non isotab outputs in it which conduct heat much better than the factory iso tab ones. FeaturesLine in/out- hp/lp crossover-bass and treble boost-bridgeable...As I said..specs are available by doing a google search...This is a used amp and is sold as-is...meaning there is no warranty with this amplifier.