The Hifonics ZD-750.4D ZEUS DELTA is a compact four-channel Class D amplifier that delivers up to 750 watts, with a PWM MOSFET power supply that keeps current levels steady. It runs four channels at 4 ohms (4 x 100 watts) or 2 ohms (4 x 175 watts), and can be bridged to two channels at 4 ohms (2 x 375 watts) for flexible system building.

Onboard variable electronic crossovers (50Hz–250Hz high-pass and low-pass, 12dB per octave) and built-in bass control let you tailor frequencies to your speakers and subwoofers, while nickel-plated RCA inputs and a low-noise preamplifier circuit keep the signal clean. The aluminum heat sink manages heat, and the angled molded terminals accept 4 AWG power and ground wire plus 12 AWG speaker wire. DC SIGNAL SENSE turns the amp on from the RCA inputs without a remote wire, and LED diagnostics monitor overload and speaker short protection.