BOSS Amplifiers CX600 

4-Channel Mosfet Bridgeable Amplifier with
remote subwoofer level control

Chaos Exxtreme 800W 4 Channel Full Range, Class A/B Amplifier

800 W MAX Power 4 Channel
150 W X 4 RMS @ 2 ohm
75 W X 4 RMS @ 4 ohm
300 W X 2 RMS Bridged @ 4 ohm
Full Range, Class A/B, MOSFET Power Supply
High and Low Level Inputs
Fixed High Pass Crossover, Variable Low Pass Crossover, Variable Bass Boost
Include Remote Subwoofer Control