Kole Audio KP3000.4D 3000 Watt 4-Channel Amplifier Class D Car Audio Amp

The KP3000.4D is a four-channel Class D car amplifier rated at 3000W max power, built into a chassis measuring 12.25" long, 8.5" wide, and 2.25" tall. Full-range Class D topology and SMT construction keep the footprint small, so it mounts under a seat, behind a rear panel, or in the tight cargo area of a compact car without giving up output.

Power configurations are flexible. Run all four channels at 4 ohms for 285W each, at 2 ohms for 375W each, or bridge it to two channels at 4 ohms for 750W each. That range covers a component front stage with rear fill, a four-speaker setup with extra headroom, or a bridged pair feeding subwoofers.

Tuning happens on the amplifier. Variable 12dB high pass, low pass, and subsonic crossovers send the right frequency range to each speaker, and 12dB bass boost adds weight to the low octaves. Low-level RCA inputs accept 200mV to 6V signals, while the high-level input with signal sense auto turn-on connects to a factory head unit that has no remote turn-on lead. Select models include a dash mount gain control module for adjustments from the front seat.

Construction holds up to daily use. A MOSFET power supply with audiophile grade IR transistors handles current demand, a military grade SMT PCB keeps dynamic performance consistent, and a die-cast aluminum alloy heatsink pulls heat away during long sessions at volume. Direct short, thermal, and overload protection circuits shut the amplifier down before damage occurs. Power terminals accept 4-gauge wire and speaker outputs accept 8-gauge, matching the current this amplifier moves.