QS Series amplifiers are all about efficient design capable of full-range frequency response at a great price! The QS3000 features a regulated power supply that is able to constantly deliver power and provides an unsurpassed efficiency rate of 80–90% in a small aluminum heatsink. 3000 watts TRUE RMS certified at full range output Digital Class D Brazilian Technology 1 Channel car audio amplifier stable at 1 Ohm gives you the benefit of wiring multiple speakers and dividing the power. Engineered to be the most efficient full range amplifier so that you can get the most out of your vehicle’s electrical system! A small footprint and compact chassis make this amplifier easy to install anywhere in the vehicle: 7.30″ Wide x 8.66″ Length x 3.00″ Height 4-way protection circuitry features high voltage, low voltage, shortage, and current protection. Built-in Power/Protection/Clip LED indicators on the top panel. Channels 1 Channel Rated RMS Power at 14.0 V at 1 Ohm 3000 Watts Rated RMS Power at 14.0 V at 2 Ohm 2100 Watts GENERAL SPECIFICATIONS Impedance 1 Ohm Channels 1 Channel Rated RMS Power at 14.0 V at 1 Ohm 3000 Watts Rated RMS Power at 14.0 V at 2 Ohms 2100 Watts Average Efficiency 76% Operating Voltage 9 to 16 Volts Musical Current Draw 155 A Minimum Power Wire Input (OFC) 4 Gauge Protection Fuse or Circuit Breaker 150 Amps Minimum Speaker Wire Output 14 Gauge Frequency Response(-3dB) 20 – 20,000 Hz Min. Input Sensitivity for Max. Output 200 mV Signal Input 1 Pair RCA Signal to Noise >90 dB Protection System Low & High Supply Voltage / Shortage on Output / Low Impedance on Output Heat Sink Type Heavy Duty Cast Aluminum Dimensions ( W x D x H ) 7.30″ x 8.66″ x 3.00″ Weight 5.10 Lbs