Crunch CRA-2000.4 2000W Four-Channel Car Amplifier

The Crunch CRA-2000.4 is a four-channel Class D car audio amplifier designed to add dedicated amplification to a vehicle sound system. It can power four speakers in stereo or support bridged configurations for systems that need fewer, higher-output channels. Its compact dimensions make it a practical choice when installation space is limited.

This amplifier is intended for listeners building or upgrading an aftermarket system with component speakers, coaxial speakers, or a mixed speaker-and-subwoofer arrangement. It provides rated output of 250 watts per channel at 4 ohms or 500 watts per channel at 2 ohms. For bridged use, it is rated for 1,000 watts x 2 channels at 4 ohms.

A switch-mode power supply supports stable amplifier operation as vehicle voltage changes. Crunch SPEED-FET MOSFET output devices are used in the amplifier design, while the low-noise preamplifier circuit is intended to keep the incoming signal path controlled. The stated frequency response is 10 Hz to 30 kHz.

Fully adjustable 12 dB-per-octave high-pass and low-pass crossovers help tailor the amplifier to the speakers connected to it. Both filters adjust from 40 Hz to 400 Hz, allowing channels to be configured for full-range speakers or filtered for a particular role in the system. RCA and high-level inputs provide connection options for aftermarket and factory-style audio systems.

The CRA-2000.4 supports four-channel stereo, dual stereo bridged, stereo plus bridged mono, and dual bridged mono operation modes. Signal-sensing remote turn-on can simplify integration with a source unit, while overload and speaker-short protection are monitored through an LED diagnostic system. It is a universal amplifier rather than a vehicle-specific fitment part.

Key Features

• Four-Channel Class D Design: Delivers efficient multi-channel amplification in a compact chassis.
• Flexible Power Ratings: Supports 4-ohm, 2-ohm, and 4-ohm bridged speaker configurations.
• Adjustable Crossovers: High-pass and low-pass filters adjust from 40 Hz to 400 Hz.
• RCA And High-Level Inputs: Accommodates aftermarket radios and compatible factory audio systems.
• SMPS Power Supply: Helps maintain stable operation as vehicle voltage varies.
• Protection Diagnostics: LED indication monitors overload and speaker-short protection.

Design & Installation

The amplifier uses an aluminum heat sink with Crunch Quick Thermal Dispersion Technology to help manage operating heat. Nickel-plated brass connection terminals are intended to resist corrosion, and the screw-down terminal design provides accessible connection points. The black amplifier chassis measures 8.5 inches long, 4.25 inches wide, and 2.1 inches high.

Use 4 AWG power and ground wiring at the amplifier terminals, and use up to 8 AWG speaker wire at the speaker terminals. The amplifier requires external 75A fusing, and it supports a minimum 2-ohm load per unbridged channel or a minimum 4-ohm bridged load. Set gains and crossover points to suit the connected speakers and the source unit's output level.