Taramps HD800 1-Ohm Class D 800W Amplifier Output power (at 13.8VDC): 1 ohm: 959W RMS; 2 ohm: 547W RMS; 4 ohm: 297W RMS. Bass Boost: 0 to 10dB (50Hz); THD: 0.3 percent; Frequency range: 10Hz to 22KHz. Crossover: H.P.F: 10Hz to 50Hz; L.P.F: 50Hz a 22kHz; Current draw at rest: 1.1A; Musical maximum: 38.5A; Maximum sinusoidal draw: 77A. Protection system: Short into output, power supply high/low. Dimensions: 226 x 55 x 187mm; Weight: 1.46kg; 8.9 x 2.2 x 7.4 in; Weight: 3.2 lbs.