Hifonics ZD-1950.1D Mono Block Car Amplifier

The Hifonics ZD-1950.1D is a compact, single-channel mobile amplifier designed for a dedicated subwoofer or bass-focused audio channel. It provides a practical way to add external low-frequency power when a factory or aftermarket receiver cannot adequately drive a subwoofer. Its mono configuration keeps setup focused on one amplified bass channel.

This amplifier is suited to vehicle owners building a subwoofer system with a compatible 1-, 2-, or 4-ohm final load. Published output is 1 x 1950 watts at 1 ohm, 1 x 975 watts at 2 ohms, and 1 x 450 watts at 4 ohms. Adjustable low-pass, subsonic, and bass-boost controls help tailor the amplified range to the subwoofer enclosure and listening preference.

The ZD-1950.1D uses a Class D design with a PWM MOSFET power supply and Simpatico coil design. This compact amplifier architecture is intended to provide stable power delivery while managing heat efficiently. An aluminum heat sink supports thermal dissipation during normal operation.

Installation-focused features include angled RCA inputs and molded terminals for power, ground, and speaker wiring. The amplifier also has LED diagnostics for overload and speaker-short protection. A built-in low-noise preamplifier circuit is designed to accept source-unit signal with minimal distortion.

For system flexibility, the ZD-1950.1D includes a remote subwoofer level control and DC Signal Sense auto turn-on capability. When enabled, DC Signal Sense can allow the amplifier to turn on from an incoming signal without a separate remote turn-on wire. It is a focused option for upgrading the bass section of a universal vehicle audio system.

Key Features

• Mono Class D Design: Delivers power through one dedicated channel for a subwoofer application.
• Three Published Power Ratings: Supports 1-, 2-, and 4-ohm system configurations.
• Variable Low-Pass Filter: Adjusts the bass passband from 50 to 250 Hz.
• Adjustable Subsonic Filter: Filters very low frequencies from 15 to 40 Hz.
• DC Signal Sense: Can activate the amplifier without a remote turn-on wire.
• Included Bass Remote: Provides convenient adjustment of subwoofer level from the cabin.

Design & Installation

The amplifier has a black compact chassis with an aluminum heat sink, nickel-plated RCA inputs, and high-temperature, impact-resistant connection components. Its molded connection terminals are angled to improve access and support a cleaner wiring layout. LED power and protection indicators provide visible amplifier-status feedback.

Use the ZD-1950.1D with a correctly wired mono subwoofer load that matches its published 1-, 2-, or 4-ohm ratings. The power and ground terminals accept up to 4 AWG wire, while the speaker terminal accepts up to 12 AWG wire; an external 100A fuse is specified. Set gain, low-pass filter, subsonic filter, and bass boost conservatively during installation, and verify polarity, impedance, grounding, and vehicle charging-system capacity before use.