Crunch DR-1325.1 V-Drive Mono Subwoofer Amplifier

The Crunch DR-1325.1 is a V-Drive mono car amplifier made to power a subwoofer system from a compact chassis. It provides one amplified channel for a dedicated bass speaker, helping add low-frequency output to an aftermarket audio system. Its 2-ohm-stable design supports common single-subwoofer and multi-subwoofer wiring configurations that present a safe final load.

This amplifier is intended for listeners building a subwoofer-focused system who want adjustable bass tuning rather than a full-range multi-channel amplifier. It offers up to 1 x 1,325 watts at 2 ohms and 1 x 650 watts at 4 ohms, as listed by the manufacturer. Because it is mono only, it is designed for subwoofer duty rather than powering separate left and right speakers.

The DR-1325.1 uses a Class A/B circuit with proprietary Crunch SPEED-FET MOSFET output components. A low-noise preamplifier circuit, variable input sensitivity, and adjustable low-pass filtering help integrate the amplifier with an aftermarket or factory-compatible audio source. The onboard bass control, bass boost, and subsonic filter provide useful adjustment points when tuning a subwoofer enclosure.

Quick Thermal Dispersion technology uses an aluminum heat sink to manage operating heat during normal music playback. The amplifier also uses a pulse-width-modulated power supply and nickel-plated brass terminals for its power and speaker connections. LED protection diagnostics are included to indicate overload or speaker-short protection conditions.

For everyday use, the included wired bass remote places bass-level adjustment within reach of the driver. The built-in LED VU meter can assist with gain adjustment, while the selectable logo lighting can be set to constant red, VU meter operation, or off. It is a practical choice for adding a dedicated powered subwoofer stage to a vehicle audio upgrade.

Key Features

• Mono Subwoofer Channel: Delivers one dedicated channel for a bass speaker system.
• 2-Ohm Stable Output: Supports a final speaker load down to 2 ohms.
• Variable Low-Pass Filter: Tunes the upper bass cutoff from 40 Hz to 300 Hz.
• Subsonic Filter: Adjusts low-frequency filtering from 10 Hz to 40 Hz.
• Wired Bass Remote: Allows convenient bass-level adjustment from the cabin.
• Selectable Logo Lighting: Offers red, VU meter, or off illumination modes.

Design & Installation

The DR-1325.1 has a black V-Drive chassis with a QTD aluminum heat sink, LED VU meter, illuminated protection indicators, and screw-down connection points. Its nickel-plated brass terminals are designed for secure, corrosion-resistant power and speaker connections. The compact amplifier measures 8.0 inches long, 5.83 inches wide, and 2.2 inches high.

Mount the amplifier securely in a ventilated location and do not mount it upside down. Use 4 AWG cable for the 12V and ground connections, use an externally fused power lead with a 60A fuse, and use up to 8 AWG speaker wire at the amplifier terminals. Connect a compatible RCA signal source, set gain from minimum during initial setup, and ensure the final subwoofer load is not lower than 2 ohms.