Kicker 51KXMA15001 1500 Watt Marine Mono Amplifier Sub Amp Class D KXMA1500.1

The KICKER KXMA1500.1 is a Class-D mono amplifier built for the water. It produces the same 1,500W at either 1 or 2 ohms, which is the detail that matters most on a boat: you get full output whether the wiring lands at one impedance or the other, so subwoofer choice is not dictated by the amplifier.

Marine hardware is not a label here. The circuit board is conformal-coated against moisture and salt air, the power connections meet ABYC and NMMA requirements, and 316L stainless-steel mounting hardware comes in the box. Those three things are what separate an amplifier that survives a season on open water from one that corrodes at the terminals.

Tuning is thorough. A variable 40 to 160Hz low-pass crossover at 24dB/octave and a variable 10 to 80Hz subsonic filter let you match the amplifier to a sealed or free-air enclosure. KickEQ+ parametric bass boost adds 0 to 6dB at 40Hz. The included KMBLC remote level control mounts at the helm so bass can be adjusted with passengers aboard, and full-range RCA pass-through outputs let you add a second amplifier without splitters.

Dynamic power reaches 2,500W and frequency response runs 10Hz to 160Hz. Input sensitivity covers low-level 125mV to 5V and high-level 250mV to 10V, so a factory marine source unit or an aftermarket head unit connects directly. Run it on a wakeboard boat tower system, a pontoon with under-seat subwoofers, or a center console that needs bass over engine and wind noise.