BOSS Audio Systems R4002 2 Channel 800 Output Class A/B Car Amplifier

Power - 400 Max x 2 @ 2 Ohms, 200 Max x 2 @ 4 Ohms, 800 Max Bridged x 1 @ 4 Ohms, Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers, Low & High Level Inputs - A low level (RCA) input is measured in voltages. A high level (+/- wire) input is measured in wattages. Both essentially carry signal from your receiver to your amplifier to your speakers, Variable Input Gain Control - The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier, Class A/B Topology - Class A amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class B amplifiers have no current flowing through its outputs with no audio signal, Specs - Dimensions: 10. 72 x 10. 44 x 2. 25, Weight: 5. 20 lbs. , Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0. 01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 1 40 Amp ATO Blade.