Lab Gruppen CMA2402 2 x 240W Commercial Mixer Amplifier with 8 Inputs

Product Overview

The Lab Gruppen CMA2402 is a 2-channel, 2x240W commercial mixer amplifier with an integrated 8-input mixer section, designed for permanent installation in distributed audio systems across retail, hospitality, corporate, and institutional environments. It combines amplification and input mixing in a single half-rack 1U unit, reducing rack space and system complexity compared to separate mixer and amplifier components. The CMA2402 is a practical choice for commercial AV integrators specifying background music systems with multiple microphone and line-level sources.

Product Description

The CMA2402 delivers 240 watts per channel across two independently controlled output zones, each switchable between low-impedance (4/8 ohm) and high-impedance (70V/100V) constant-voltage operation via rear-panel dipswitch. Its 8-input mixer section provides six balanced mic/line inputs via Euroblock connectors and two additional line inputs, each with individual volume controls accessible from the front panel. Input routing dipswitches on the rear panel allow each of the eight inputs to be assigned to Output A, Output B, or both outputs simultaneously, enabling flexible zone coverage without external signal routing hardware. Front-panel master volume, bass, and treble controls for each output zone allow quick adjustments by facility staff without accessing rack-mounted rear panels. A priority muting function on Input A automatically reduces background music levels when a paging or announcement signal is detected, supporting public address applications in retail and commercial building environments. Fanless convection cooling provides silent operation suitable for noise-sensitive spaces including offices, conference rooms, and hotel lobbies. Auto Ramp circuitry activates the amplifier when signal is detected and initiates a 20-minute sleep timer during inactivity, keeping energy consumption within Energy Star certification thresholds. The unit ships with joining brackets for rack, wall, or table mounting in a standard 19-inch equipment rack.

Key Features

• 2x240W Dual-Zone Output — Powers two independent speaker zones at up to 240W per channel across 4/8 ohm or 70V/100V loads.
• 8-Input Mixer Section — Six balanced mic/line Euroblock inputs plus two line inputs, each with individual volume control.
• Configurable Input Routing — Rear-panel dipswitches route any input to Output A, Output B, or both zones independently.
• Priority Muting on Input A — Automatically reduces background music level when a priority paging or announcement signal is present.
• Front-Panel Zone Controls — Independent master volume, bass, and treble controls per output zone for quick on-site adjustment.
• Fanless Convection Cooling — Completely silent operation with no moving parts, suitable for occupied commercial spaces.
• Auto Ramp & Sleep Mode — Signal-activated power-on and 20-minute inactivity sleep timer reduce operating costs.
• Flexible Mounting — Half-rack 1U enclosure with brackets for rack, wall, or table installation.

Typical Applications

• Retail store background music with zone control
• Restaurant and bar distributed audio systems
• Hotel lobby and common area background music
• Corporate office and open-plan workspace audio
• Conference room and boardroom audio distribution
• House of worship overflow and lobby audio
• Multi-purpose room and training room audio

Technical Specifications

Frequently Asked Questions

Q: What is the difference between the CMA2402 and the CPA2402?

A: Both are 2x240W 8-input commercial mixer amplifiers. The CPA2402 adds an integrated Bluetooth receiver and USB media player for wireless and file-based audio playback. The CMA2402 is the analog-only version, typically preferred when a separate source component or DSP is used upstream.

Q: Can the CMA2402 drive 70V speaker lines without an external transformer?

A: Yes. Each output channel can be switched to 70V or 100V constant-voltage operation via rear-panel dipswitch, driving standard 70V distributed speaker systems directly.

Q: How are the 8 inputs routed to the two output zones?

A: Rear-panel input routing dipswitches control which output zone (A, B, or both) each of the 8 inputs feeds. By default, Inputs A–D route to Output A and Inputs E–H route to Output B, but any combination can be configured.

Q: Is the CMA2402 suitable for rack installation?

A: Yes. It is a 1U half-rack unit. Two CMA2402 units can be joined with the included brackets to fill a standard 1U rack space, or each unit can be rack-, wall-, or table-mounted individually.

Q: Does the CMA2402 support microphone inputs for paging?

A: Yes. Six of the eight inputs are balanced mic/line Euroblock connectors suitable for dynamic or condenser microphones. Input A includes configurable priority muting, which automatically reduces background music when a paging signal is detected.

Q: What energy management features does the CMA2402 include?

A: Auto Ramp circuitry powers the amplifier on when input signal is detected and activates a sleep mode after 20 minutes of inactivity, reducing power consumption and supporting Energy Star compliance.