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Package Contains: ATOM P20 1600W Peak / 440W Dyno-Certified RMS 4-Channel Marine/ATV/Car Bluetooth Amplifier with Volt Meter, and RWK42 4 AWG 4-Channel Car Amp Wiring Installation Kit with (2) RCA Cables. Robust 4-Channel Output: Dyno-certified RMS ratings provide 110W x 4 @ 2 Ohm, 70W x 4 @ 4 Ohm, or 220W x 2 bridged @ 4 Ohm with <1% THD+N, delivering dependable power for up to 8 speakers, subwoofers, or mixed configurations. Peak power attains 1600W for headroom and dynamic audio. Advanced Crossover Controls: Each channel pair features its own 12dB/Octave crossover with selectable high pass, low pass, or full-range modes. Adjustable filters from 50Hz-250Hz enable you to fine-tune subs, mids, tweeters, or full-range speakers with precision. Marine-Grade Build: Incorporates a conformal-coated PCB with waterproof glue, rustproof aluminum heat sink, stainless steel end panels, and stainless mounting hardware designed to resist salt, moisture, and harsh outdoor environments. Complete Wiring Kit Provided: The RWK42 kit contains 4 AWG translucent blue power and ground cables, two 100% copper twisted-pair RCA cables, a remote wire, speaker wire, a fuse holder with fuses, split loom, and installation accessories for a neat and reliable setup