JX Series Monoblock Amplifier 500 rms @ 4ohms 750 rms @ 3ohms and 1000 rms @ 2ohms;Unregulated PWM switching type power supply;Variable Bass Boost (0 to +12 dB bass boost centered at 45 Hz);Soft start turn-on prevent clicking and popping when system turns on;Dimensions: 11L x 7-3/4W x 2H