Hifonics HAC-2000.4D 2000 Watt 4-Channel Car Stereo Amplifier Class D Amp

The Hifonics HAC-2000.4D is a COLOSSUS PRO four-channel amplifier rated at 2000W, using a half-bridge design with fewer components to produce more output. It delivers 4 x 175W at 4 ohms, 4 x 300W at 2 ohms, 4 x 500W at 1 ohm, and 2 x 750W bridged at 4 ohms, which is enough to run a full set of speakers or a bridged pair of subwoofers.

A full range Class-D chipset makes the amplifier compatible with a wide range of drivers, including pro-style speakers that need current more than finesse. Variable-speed fan cooling works with a mass-loaded extruded aluminum heat sink so output holds steady during long sessions, and an iron core transformer keeps electromagnetic interference away from other vehicle electronics.

Crossovers are variable at 12dB per octave: high-pass from 15Hz to 6kHz and low-pass from 40Hz to 2kHz, with built-in bass control offering 0 to 12dB of boost. Input sensitivity spans 0.2V to 5V for a wide range of source units. Rated performance is 86dB signal-to-noise, under 0.5% THD, and 10Hz to 30kHz response.

Triple protection circuits cover over and under voltage, short circuit, and thermal faults, and delayed turn-on keeps hisses and pops out of the speakers. Connections use 0 AWG power and ground with 12 AWG speaker terminals behind a 150A external fuse, all on angled molded terminals for clean wire management. The chassis measures 14.8in x 10in x 3in and weighs 10.85 lb, with blue LED Hifonics badging and a CNC machined Colossus badge.