KS-DR1004D [Open Box]

The JVC KS-DR1004D is a 400-watt 4-channel Class-D amplifier built for marine boats, Polaris RZRs, ATVs, UTVs, and golf carts, anywhere factory power isn't enough to power aftermarket speakers properly. Conformal coating protects the circuit board from moisture, salt spray, and other contaminants that regularly damage amplifiers mounted outdoors or in a boat's engine bay.

Separated pre-amp and power-amp circuit boards cut down on radiation noise, and a large LPF coil keeps sound stable and distortion-free even at higher volumes. Variable HPF and LPF controls use a rotary dial for finer adjustment than a fixed switch allows, so you can match the crossover point to your specific speakers. It accepts both RCA and high-level speaker inputs, with auto power control that turns the amp on from a signal instead of a dedicated remote wire. At 145 x 45 x 99mm and 1.5 lb, it mounts easily in tight spaces under a seat or dash where a full-size amplifier won't fit.