Crank up the sound in your car with this Pyramid 10-band graphic equalizerCar amplifier features 12db boost/cut and power on/off switchAmp has color illuminated LEDsand multi-function LED displayFold down acrylic door150 watts x 2 maximum output2 or 4 speaker hook-upBuilt-in heavy duty aluminum heatsinkFader and balance controlLow level rca input jacksFloating/common GND high level wire harnessFrequency resp.: 20hz - 20khzS/N ratio: better than 60dbOutput impedance:4-8 ohms allowableBuilt-in fm antenna booster with switchFM antenna maximum sensitivity: 5dbFor 12v dc negative ground systemsDimensions: 6.88 inches wide x 6 inches deep x 1.5 inches highauto amplifier,car stereo amplifier Energy Efficiency