1-Channel High Output Class D Amplifier with Remote for Subwoofer 1x 300 Watts RMS @ 4 Ohm Mono 1x 500 Watts RMS @ 2 Ohm Mono 1x 800 Watts RMS @ 1 Ohm Mono Frequency response: 10Hz - 20kHz The Output power is measured by 12,5 Volt/1kHz S/N Ratio >100dB THD: 0,05 % Var. 18dB Lowpass 50Hz - 250Hz Var. Bass Boost 0-18dB at 40Hz - 100Hz Subsonic Filter 20Hz - 50Hz Volt Meter, LED Level Display 2 Fans with Chrome Grilles Line Output 4-way Protection Circuitry Blue Illumination Dimensions (LxWxH): 13 1/8 x 11 3/4 x 2 1/2 inch