HERTZ HCP 4, 4 channels, 760W HERTZ HCP 4 car amplifier is a 4-channel amplifier designed to play any music genre with four separate channels for multiple configurations. Pre-In and high-level inputs (Speaker-In) allow connection to any base unit. Designed to work in mono as part of a three-channel stereo subwoofer system for a powerful two-channel system, HCP 4 is a unique versatility model. All Hertz Compact Power amplifiers are assembled with high quality components and feature a complete and official crossing system. The dissipation system is optimized with the heat transferred to the radiator and then dissipates through the sides of the amplifier for efficient cooling Connectivity: HI-IMPUT or RCA / AUTO ON / OFF