Hifonics HCC-3000.1D Mono Class D Subwoofer Amplifier

The Hifonics Colossus Classic HCC-3000.1D is a mono car audio amplifier designed to power a subwoofer system. Its single-channel, 1-ohm-stable configuration is intended for installations that prioritize low-frequency output and flexible bass tuning. The amplifier is rated for up to 3,000 watts into a 1-ohm load, with lower-power ratings available at 2 and 4 ohms.

This amplifier is a practical fit for enthusiasts building a dedicated subwoofer stage rather than a full-range speaker system. A variable low-pass crossover and subsonic filter help match the amplifier to the enclosure and subwoofer arrangement being used. Variable bass boost, phase adjustment, and the included wired bass-level remote provide additional control from the driver’s seat.

The HCC-3000.1D uses Hifonics Super D-Class amplification and Ultra-Fi MOSFET output devices. Its low-noise preamplifier circuit is designed to accept a low-voltage source signal with minimal added distortion. The published frequency response spans 10 to 500 Hz, supporting its intended role in a bass-focused system.

For system integration, the amplifier provides nickel-plated RCA connections and a mono preamp output for passing signal to another amplifier. Speaker-level input capability is available with a compatible accessory adapter, which can help when adding the amplifier to a factory-radio system. Signal-sensing remote turn-on is also listed for simplified integration in applicable installations.

The Colossus Classic chassis combines an aluminum alloy heat sink with a dual-coil PWM power supply. LED diagnostics monitor overload and speaker-short protection conditions. With a 1-ohm minimum load, external 250A fuse requirement, and recommended 4 AWG wiring, this amplifier should be installed as part of a properly planned high-current car audio system.

Key Features

• Mono Subwoofer Amplifier: A dedicated one-channel design for powering a subwoofer system.
• 1-Ohm Stable Operation: Supports a minimum 1-ohm unbridged speaker load.
• Super D-Class Design: Uses high-speed processing and MOSFET output devices.
• Adjustable Bass Controls: Includes low-pass, subsonic, bass-boost, and phase adjustments.
• Wired Bass Remote: Lets the driver adjust bass level from the cabin.
• Protection Diagnostics: LED indicators monitor overload and speaker-short conditions.

Design & Installation

The HCC-3000.1D uses a heavy-duty aluminum alloy heat sink to help dissipate heat from its output section. Its nickel-plated RCA jacks and high-temperature, impact-resistant nickel-plated connectors are designed for durable signal and power connections. Molded power, ground, and speaker terminals are angled for easier access during installation.

Mount the amplifier securely in a ventilated location and do not mount it upside down. Use quality copper power and ground cable, an external 250A fuse placed close to the battery, and 4 AWG wiring as recommended for this model. Confirm that the final subwoofer wiring impedance is no lower than 1 ohm, then set gain and crossover controls carefully to suit the connected subwoofer and enclosure.