HIFONICS ZG-2400-1D Mono Class D Car Amplifier

The HIFONICS ZG-2400-1D is a mono Class D car audio amplifier designed for powering a dedicated subwoofer system. It gives an installer a compact amplifier option with selectable output capability for 4-, 2-, or 1-ohm final loads. High-level and RCA inputs support integration with either factory or aftermarket source units.

This amplifier is intended for listeners building a bass-focused system and needing control over low-frequency output. Its variable low-pass crossover, subsonic filter, bass boost, and phase adjustment help tailor a subwoofer's response to the vehicle and enclosure. A wired bass remote is included for convenient level adjustment from the cabin.

The ZG-2400-1D is rated at 600 watts x 1 at 4 ohms, 1,200 watts x 1 at 2 ohms, and 2,400 watts x 1 at 1 ohm. Its 10 Hz to 500 Hz frequency response and mono-only configuration make it suitable for subwoofer duty rather than full-range speaker amplification. Proper subwoofer wiring is important to present a supported final impedance to the amplifier.

HIFONICS uses a PWM MOSFET power supply with Simpatico Coil Design in this model. The design is paired with Ultra-Fi output devices and a low-noise preamplifier circuit. These components are intended to provide stable power delivery while maintaining the compact Class D format.

The amplifier can serve as the subwoofer stage in a system with a separate full-range amplifier or powered factory speakers. RCA outputs allow signal pass-through for adding another amplifier without running an additional signal cable from the source unit. Built-in protection diagnostics provide illuminated status indication for overload and speaker-short conditions.

Key Features

• Mono Class D Design: Efficient single-channel amplification for a dedicated subwoofer system.
• Selectable Load Output: Rated for 4-, 2-, and 1-ohm subwoofer configurations.
• Variable Low-Pass Filter: Adjusts the upper bass cutoff from 40 to 300 Hz.
• Subsonic Filter: Filters very low frequencies from 10 to 40 Hz.
• High-Level Inputs: Supports connection to source units without RCA outputs.
• Wired Bass Remote: Provides in-vehicle adjustment of bass output level.

Design & Installation

The ZG-2400-1D uses an aluminum heat sink, a PWM MOSFET power supply, and molded angled connection terminals. Nickel-plated RCA inputs are designed for secure signal connections, while the end-panel LED diagnostics indicate protection status. Its compact mono-block layout is intended for vehicle audio installations where wiring access matters.

Use 4 AWG wire at the 12V and ground terminals and up to 12 AWG speaker wire at the speaker terminals. The amplifier uses 100A fusing and should be installed with properly routed, fused battery power according to the installation guide. Set the input level, crossover, subsonic filter, and phase controls after confirming the connected subwoofer system presents a supported final impedance.