Boss NX3000.4 Onyx 3000 Watt 4-Channel Mosfet Bridgeable Amplifier with Remote Four-channel Onyx amplifier with MOSFET power supply and triode operation Delivers 750 Watts x 4 at 2 ohms; 300 Watts x 4 at 4 ohms; 1500 Watts x 2 bridged Line and speaker level inputs with variable gain control Built-in low- and high-pass variable crossovers; 18dB bass boost Includes remote subwoofer level control