Crunch CM4

The Crunch CM4 is an exceptionally compact 4-channel Class D digital amplifier that delivers impressive output power despite its small size. With up to 4 x 100 watts RMS at 2 ohms or 2 x 200 watts RMS at 4 ohms in bridge mode, this mini power amplifier is ideal for high-performance car audio systems with limited space.

Thanks to modern Class D technology, the CM4 achieves a high efficiency of up to 85% and combines efficient power amplification with a minimal footprint. The high-quality die-cast aluminum housing with a diamond-cut logo provides a sleek look and aids in heat dissipation. Measuring just 90 x 43 x 140 mm, the amplifier can be installed, for example, behind the glove compartment, under the dashboard, or in small storage compartments.

For flexible sound tuning, the Crunch CM4 features separately adjustable high-pass and low-pass filters for the front and rear channels. The switchable 2-/4-channel input configuration allows all four amplifier channels to be operated with just a single stereo input signal. In addition to standard RCA inputs, high-level inputs with EPS technology are available, allowing the amplifier to be integrated into numerous factory-installed sound systems. An automatic power-on function and detachable power and speaker connectors further simplify installation.

Technical Specifications

Amplifiers and Power

• Model: Crunch CM4

• Series: Crunch Mini Series

• Amplifier Type: Digital 4-Channel Mini Amplifier

• Amplifier Technology: Class D

• Number of channels: 4

• RMS output power at 4 ohms: 4 x 60 watts

• RMS output power at 2 ohms: 4 x 100 watts

• RMS output power (bridged at 4 ohms): 2 x 200 watts

• Maximum output power at 4 ohms: 4 x 120 watts

• Maximum output power at 2 ohms: 4 x 200 watts

• Maximum output power (bridged at 4 ohms): 2 x 400 watts

• Efficiency: Up to 85%

• Permissible speaker impedance: 2–8 ohms

• Minimum impedance in bridge mode: 4 ohms

• Total Harmonic Distortion (THD) at 5 watts: < 0.02%

• Signal-to-noise ratio: > 90 dB
  
  

Crossover Networks and Sound Settings

• High-pass filter (HPF) Front: 50–5,000 Hz

• Low-pass filter (LPF) Front: 50–5,000 Hz

• High-pass filter (HPF) Rear: 50–5,000 Hz

• Low-pass filter (LPF) Rear: 50–5,000 Hz

• Filter slope: 12 dB/octave

• Crossover Modes: High-Pass / Low-Pass / Full-Range

• Separate filter settings for front and rear

• Separately adjustable input sensitivity for front and rear channels

• Input selector switch: 2CH / 4CH
  
  

Connections and Features

• Low-level inputs: 4 x RCA (2 x stereo)

• High-level inputs: 4 channels via the included RCA high-level adapters

• High-level inputs with EPS technology to prevent error messages in the vehicle diagnostic system

• RCA input sensitivity: 0.2–6.0 V

• Input sensitivity (high level): 0.6–17.0 V

• Automatic power-on function: Yes, can be enabled

• Auto Turn-On via High Level: DC Offset Detection

• Auto Turn-On via RCA: VOX Signal Detection

• Separate remote connection: Yes

• Removable power connection terminal

• Removable speaker connector

• Status Indicator: Power / Protect LED

• Built-in protection against overheating and malfunctions
  
  

Power Supply and Dimensions

• Operating voltage: 10.5–16.5 V DC

• Short-term undervoltage: Up to 7 V for a maximum of 5 seconds

• Vehicle system: 12 V with negative ground

• Circuit breaker: 1 x 40 A

• Housing: Die-cast aluminum heat sink

• Design: Diamond-Cut Logo

• Width: 90 mm

• Height: 43 mm

• Length: 140 mm
  
  

What's Included

• 1 x Crunch CM4 4-Channel Class-D Amplifier

• 2 x Stereo RCA High-Level Adapters

• 1 x Removable speaker connector

• 1 x Removable Power Plug

• 1 x User Manual