Legacy LA660 4 Channel 1000 Watt Bridgeable Mosfet Amplifier (Discontinued by Manufacturer) 4 Channel Amplification Tri-Way Configuration 250 Watts x 4 Output 500 Watts x 2 Bridged 250 Watts x 2 Front 500 Watts x 1 Rear Dual Fully Adjustable Electronic Crossover Dual Variable Bass Boost (0-12dB 60Hz) Soft Turn On/Off Circuit