BOSS Audio Systems AR4000D Class D Car Amplifier - 4000 Watts
.01%, S/N Ratio 100 dB Class D, Monoblock, MOSFET power supply, subwoofer level control4000 @1-Ohm x 1 max, 2000 @2-Ohms x 1 max1000 @4-Ohms x 1 max, 8000 @2-Ohms x 1 max strappedLow level inputs, soft turn on circuit, power & protection LEDsThermal overload speaker & short protect, master/slave switchPhase shift selector 0-180º, variable subsonic filter 15-40 HzVariable low pass crossover 50-250 Hz, variable input gain controlInput sensitivity selector, THD @ RMS output 0. BOSS Audio Systems AR4000D Class D Car Amplifier - 4000 Watts.