The Hertz HCP 4 is a compact four-channel car audio amplifier designed to power multiple speaker configurations including stereo two-channel, bridged mono for a sub, or three-channel front plus sub setups.

It features both pre-amplified RCA inputs and high-level speaker inputs for compatibility with aftermarket and factory head units, a complete bypassable crossover, and an optimized heat sink that transfers heat to the amplifier sides for dissipation.