JX Series 1-Channel Class D Car AmplifierRMS Power Rating (14.4V): 4 ohms: 500 watts x 1 chan. 3 ohms: 750 watts x 1 chan. 2 ohms: 1000 watts x 1 chan. RMS Power Rating (12.5V): 4 ohms: 500 watts x 1 chan. 3 ohms: 700 watts x 1 chan. 2 ohms: 900 watts x 1 chan. Unregulated PWM switching type power supplyRemote bass level input (JL Audio RBC-1 sold separately)LED power (green) and protect (red) indicatorsVariable Bass Boost (0 to +12 dB bass boost centered at 45 Hz)Soft start turn-on prevent clicking and popping when system turns on1 channel operationSpeaker-level (high-level) inputs with signal sensing for automatic turn-onPreamp RCA outputs to daisy chain multiple amps3-Way System Protection circuitry (thermal, low impedance, and speaker short protection)Heavy duty aluminum alloy heatsink for effective heat dissipationNickel-plated RCA level inputsNickel-plated screw terminalsInput sensitivity: Low level: 200mV-4V High level: 2.0V-10V Variable low-pass filter (50-200 Hz, 12 dB/octave)Damping factor: ,1000 @ 4 ohmsFrequency response: 20-150 Hz (+/– 1 dB)Dimensions: 11inL x 7-3/4inW x 2inH4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.1-year SonicElectronix.com warranty