DESC: 10 Band Graphic Equalizer 12dB Boost/Cut Power On/Off Defeat 2 Channel High Power Amplification 2 or 4 Speaker Hook up 300 Watts Rated Power Built in Heavy Duty Heatsinks Dual LED Power Meter Display Ratary Fader/Slide Volume Control Night Illumination Around all Controls Input Impedance:High 47k Ohm via RCA Jacks Low Input 100 Ohm Common or Floating Ground Hook up Frequency Response:20-20kHz Output Impedance:4 Ohm (4-8 Ohm allowable)