Crunch DR-2525.4D 4-Channel Class D Car Amplifier

The Crunch DR-2525.4D is a four-channel mobile amplifier designed to add dedicated amplification to an aftermarket or compatible vehicle audio system. It can power four speaker channels or be configured for bridged applications, giving installers flexibility when planning a full-range and subwoofer system. Its Class D design keeps the amplifier compact while supporting high-output system layouts.

This amplifier is suited to listeners upgrading factory-level amplification or building a custom multi-speaker setup. Variable high-pass and low-pass filters let each channel pair be tailored for the speakers connected to it. The crossover controls can help protect smaller speakers from low-frequency content or help blend amplified speakers with subwoofers.

The DR-2525.4D is rated for up to 2525 watts of maximum power, with output ratings of 320 watts per channel at 4 ohms and 630 watts per channel at 2 ohms. It also supports two bridged channels at 4 ohms, rated at 1260 watts per bridged channel. Use impedance-appropriate speakers and careful gain setting to build a balanced system.

Crunch equips this V-DRIVE amplifier with proprietary SPEED-FET MOSFET components, a PWM power supply, and a low-noise preamplifier circuit. Its QTD aluminum heat sink is designed to disperse heat during normal operation. The amplifier also includes LED protection diagnostics for overload and speaker-short monitoring.

Installation-focused details include RCA inputs, nickel-plated brass terminals, screw-down connections, and an LED VU meter for visual gain adjustment. The selectable logo illumination can operate in constant red, VU-meter, or off modes. For a practical upgrade path, it can serve a four-speaker system, a mixed stereo-and-bridged system, or two bridged speaker/subwoofer channels.

Key Features

• Four-Channel Class D Design: Powers four speakers or supports multiple bridged system configurations.
• 2525W Maximum Output: Provides high-output capability for custom vehicle audio systems.
• Variable 12dB Crossovers: Helps match frequency ranges to connected speakers or subwoofers.
• QTD Aluminum Heat Sink: Aids heat dispersion during normal music playback.
• LED VU Meter: Provides visual feedback when setting amplifier gain.
• Selectable Logo Lighting: Choose constant red, VU-meter, or off illumination.

Design & Installation

The DR-2525.4D uses a black V-DRIVE chassis with an aluminum QTD heat sink, nickel-plated brass connection terminals, and screw-down connectors. Its compact amplifier chassis is listed at 6.85 x 5.83 x 2.2 inches, while the manufacturer also lists shipping dimensions of 9.65 x 7 x 3.23 inches. LED power/protection indicators and the VU meter place key status and setup feedback on the amplifier.

Use 4 AWG cable for the 12V and ground terminals, as specified by Crunch, and protect the power run with the required external 80A fuse. The speaker terminals accept up to 8 AWG wire, and signal input is through RCA connections with 0.2-6V input sensitivity. Mount the amplifier securely in a ventilated location, set crossover mode separately for channel pairs, and set gain with appropriate test equipment rather than relying on the VU meter alone.