Zapco Z-150.4 II

4-Channel Class-AB Performance Amplifier. Power Output: 4 x 165 Watts @ 4 Ohm / 4 x 275 Watts @ 2 Ohm / 2 x 550 Watts Bridged @ 4 Ohm. Integrated Controls: HP-FULL-LP/BF Filter, 0/12dB Bass Boost, Variable Gain (8V - 0.5V). S/N Stage: > 100 dB. Frequency Response: 15 Hz - 30 KHz.