30V Bipolar Switching Power Supply, 20dB Headroom Eliminated Signal Overload;2 Selectable Balanced RCA Inputs w/ Input gain, Front, Rear, & Subwoofer RCA Outputs;Seven Frequency Bands with +/- 18db Bosst/Cut, 40Hz, 100Hz, 275Hz, 700Hz, 2kHz, 5kHz, 14kHz;Independent Subwoofer Level Control, Selectable Low-Pass Filter: 32Hz, 64Hz, 125Hz;Input Selector Switch, Fade Control, Blue Backlit Control Knobs, S/N Ratio: 115dB.;THD: 0.05%, Stereo Separation: 82dB, Frequency Response: 10Hz-15kHzMax Output Voltage: 8V