ZX Series 3-Channel Class AB with Class D Subwoofer Channel Car Amplifier Channel 1 + 2 RMS Power Rating: 4 ohms: 70 watts x 2 chan. 2 ohms: 85 watts x 2 chan. Subwoofer Channel RMS Power Rating: 4 ohms: 210 watts x 1 chan. 2 ohms: 420 watts x 1 chan. Total RMS power output at 2 ohms: 590 watts Max power output: 1100 watts approx. MOSFET power supply Wired remote bass level control included LED power and protection indicators Tuned Bass EQ (0-18 dB bass boost at 40 Hz) Balanced differential inputs make KICKER ZX Amplifiers compatible with any factory radios Eliminates unwanted noise in a system Boost, gain, and crossover frequencies are top-mounted for easy access, and a handy protection indicator featuring a new flashing yellow low-voltage light enhances the end panel Bridgeable operation Speaker-level inputs compatible (switchable) through RCA connection, Kicker 09ZISL required and sold separately Automatic turn on modes: remote, DC offset, or signal sense Thermal, voltage, and short circuit protection circuitry Variable high-pass filter (50-200 Hz, 12 dB/octave) Subsonic Filter (24 dB at 25 Hz) CEA-2006 compliant amplifier Frequency response: 20-20000 Hz Dimensions: 16-3/4"L x 9-5/8"W x 2-1/8"H 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.