AtlasIED CLA404 400W 4-Channel Power Amplifier with Power Share

The AtlasIED CLA404 is a professional 400-watt, 4-channel Class D power amplifier designed for commercial paging, background music, and multi-zone audio systems. Featuring AtlasIED's innovative Power Share technology, the CLA404 provides flexible power distribution across four amplifier channels, allowing integrators to configure output power according to the requirements of different speaker zones.

Supporting both low-impedance speaker systems (2Ω, 4Ω, and 8Ω) and constant-voltage distributed audio systems (25V, 70.7V, and 100V), the CLA404 offers versatility for commercial installations using different speaker configurations.

Each channel can be independently configured for its required output mode, making the amplifier particularly useful in restaurants, retail stores, conference facilities, educational buildings, and other commercial environments.

The CLA404 combines energy-efficient Class D amplification, a switch-mode auto-sensing power supply, rear-panel configuration controls, and automatic cooling assistance in a compact 1RU half-rack chassis.

Whether you're designing a new commercial sound system or upgrading an existing multi-zone installation, the AtlasIED CLA404 provides flexible amplification without requiring multiple separate amplifiers.

Flexible 400-Watt Power Share Technology

One of the CLA404's most valuable features is its Power Share technology, which allows the amplifier's available output power to be allocated across its four channels.

Unlike conventional four-channel amplifiers with fixed output ratings, the CLA404 provides selectable power-sharing arrangements to accommodate different speaker zone requirements.

Available configurations include:

Power Share Configuration	Total Output Power
4 × 100W	400W
2 × (175W + 25W)	400W
2 × (150W + 50W)	400W
2 × (125W + 75W)	400W

These configurations allow installers to distribute amplifier power based on the needs of the installation.

For example, a restaurant may require additional amplifier power for its main dining area while smaller zones, such as a reception area or hallway, require less.

Power Share technology provides flexibility when designing these systems without increasing the number of amplifiers.

The CLA404 delivers 400 watts of total amplifier power, distributed according to its supported configurations.

Four Independently Configurable Amplifier Channels

The AtlasIED CLA404 features four amplifier channels that can be configured for different speaker requirements.

Each channel supports:

• 2-ohm speaker systems
• 4-ohm speaker systems
• 8-ohm speaker systems
• 25V distributed audio
• 70.7V distributed audio
• 100V distributed audio

This flexibility allows the CLA404 to support different types of commercial speakers within the same installation.

For example, one channel may power a 70.7V ceiling speaker system while another drives compatible 8-ohm loudspeakers.

Independent output-mode configuration makes the CLA404 useful for installations combining existing low-impedance speakers with constant-voltage distributed audio systems.

All connected speaker loads must remain within the amplifier's supported operating limits and selected power allocation.

High-Efficiency Class D Amplification

The CLA404 uses Class D amplifier technology to provide efficient power amplification while minimizing unnecessary heat generation and power consumption.

Its thermal-optimized, direct-coupled output stage is designed to support reliable operation across the amplifier's supported speaker configurations.

The amplifier also features a switch-mode, global auto-sensing power supply that accommodates supported AC input conditions.

These design features make the CLA404 suitable for professional commercial audio installations where efficient operation and equipment reliability are important.

Energy-Efficient Operation with Less Than 1W Standby Consumption

The AtlasIED CLA404 is designed for efficient operation in commercial sound systems.

Its energy-saving features include:

• Less than 1 watt of standby power consumption
• ENERGY STAR-compliant operation
• High-efficiency Class D amplification
• Automatic cooling assistance
• Efficient power management

These features are particularly useful in commercial environments where audio equipment may remain connected to power for extended periods.

The amplifier's low standby consumption helps reduce unnecessary energy usage when the system is inactive.

Convection Cooling with Variable-Speed Fan Assistance

The CLA404 incorporates an intelligent cooling system designed to balance thermal performance with quiet operation.

During idle conditions, the amplifier relies on convection cooling.

When audio activity is detected, variable-speed fan assistance can activate as needed to help maintain appropriate operating temperatures.

This approach reduces unnecessary fan operation while providing additional cooling during active use.

The design is well suited for commercial equipment racks, conference facilities, and other professional installations.

Proper ventilation and manufacturer-recommended clearances should always be maintained.

Rear-Panel DIP Switch Configuration

The AtlasIED CLA404 provides convenient setup through rear-panel DIP switches.

These controls allow installers to configure amplifier operating modes without requiring external programming software.

Additional features include:

• Independent channel configuration
• Rear-panel level attenuators
• Remote level control capability
• Priority mute functionality
• GPI control connections
• Removable locking speaker output terminals

These features simplify installation and provide flexibility for commercial sound systems requiring external control integration.

Priority mute functionality can be particularly useful in paging systems where background music must be interrupted for announcements.

Compact 1RU Half-Rack Design

Despite delivering 400 watts across four channels, the AtlasIED CLA404 occupies only 1RU of rack height and approximately half the width of a standard equipment rack.

The amplifier measures:

• Height: 1.75 inches
• Width: 8.75 inches
• Depth: 13.5 inches

Its compact construction makes it suitable for AV equipment cabinets, commercial audio racks, and installations where space is limited.

Appropriate mounting accessories should be selected according to the installation requirements.

Ideal for Commercial Multi-Zone Audio Systems

The AtlasIED CLA404 is designed for commercial applications requiring multiple amplifier channels and flexible speaker configurations.

Common applications include:

• Restaurants and cafés
• Retail background and foreground music
• Hotels and hospitality facilities
• Conference and boardrooms
• Corporate offices
• Educational facilities
• Houses of worship
• Commercial paging systems
• Distributed 70.7V audio installations
• Mixed-impedance speaker systems

Its four-channel design makes it especially useful when multiple areas require separate amplifier outputs.

AtlasIED CLA404 Key Features

• Professional 400-watt, 4-channel Class D power amplifier
• AtlasIED Power Share technology
• Flexible power distribution across four channels
• Four independently configurable amplifier channels
• Supports 2Ω, 4Ω, and 8Ω speaker systems
• Supports 25V, 70.7V, and 100V distributed audio
• Selectable power-sharing configurations
• Rear-panel DIP switch configuration
• Rear-panel level attenuators
• Remote level control capability
• Priority mute functionality
• Seven GPI connections
• Four audio inputs
• Switch-mode, auto-sensing power supply
• Thermal-optimized direct-coupled output stage
• Less than 1W standby power consumption
• ENERGY STAR-compliant design
• Convection cooling with variable-speed fan assistance
• Compact 1RU half-rack chassis
• Suitable for commercial paging and multi-zone audio systems

AtlasIED CLA404 Technical Specifications

Specification	Details
Manufacturer	AtlasIED
Model	CLA404
Product Type	4-Channel Power Amplifier
Amplifier Topology	Class D
Total Output Power	400 Watts
Number of Channels	4
Number of Inputs	4
Power Share Configurations	4 × 100W; 2 × (175W + 25W); 2 × (150W + 50W); 2 × (125W + 75W)
Low-Impedance Output Modes	2Ω, 4Ω, 8Ω
Constant-Voltage Output Modes	25V, 70.7V, 100V
GPI Ports	7, 3.5mm Euroblock
Speaker Output Terminals	4 Removable Locking Euroblock, 5.08mm Pitch
THD at 1kHz, 1dB Below Rated Power	≤0.15%
Frequency Response (2Ω, 4Ω, 8Ω, 25V)	20Hz–20kHz (+0/-1.5dB)
Frequency Response (70V/100V)	50Hz–20kHz (+0/-1.5dB)
Signal-to-Noise Ratio (8Ω)	>93dBA Below Rated Output (A-Weighted)
Cooling	Convection at Idle; Variable-Speed Fan with Audio Signal Sense
Rack Space	1RU, Half-Rack Width
Dimensions (H × W × D)	1.75" × 8.75" × 13.5"
Dimensions (Metric)	44 × 222 × 343mm
Shipping Dimensions	4.5" × 17.25" × 11.75"
Weight	7.7 lbs. (3.38kg)

Typical Applications

Restaurants and Hospitality

Power separate dining areas, bars, lounges, and reception spaces using independently configured amplifier channels.

Retail Background Music

Support commercial background and foreground music systems using compatible low-impedance or constant-voltage loudspeakers.

Conference and Meeting Rooms

Provide efficient amplification for multiple audio zones in corporate meeting and presentation facilities.

Educational Facilities

Support paging, announcements, and distributed audio in classrooms, administrative offices, and institutional spaces.

Commercial Paging Systems

Integrate with compatible paging equipment and distributed speaker systems for voice announcements.

Mixed-Impedance Audio Installations

Configure individual amplifier channels to accommodate different speaker system requirements.

Why Buy the AtlasIED CLA404 from Audio Supply?

At Audio Supply, we specialize in professional audio equipment for commercial paging, background music, and distributed sound systems.

The AtlasIED CLA404 combines four independently configurable amplifier channels with 400 watts of total output power and flexible Power Share technology, making it a practical solution for commercial installations requiring multiple audio zones.

Whether you're upgrading an existing sound system or designing a new installation, Audio Supply can help you select compatible speakers, audio processors, and installation accessories.

Need a 2-Channel Power Amplifier Instead?

If your installation requires fewer amplifier channels, consider the AtlasIED CLA402 400W 2-Channel Power Amplifier.

The CLA402 provides the same 400-watt total output capacity with two independently configurable channels and Power Share technology.

Both amplifiers support low-impedance and constant-voltage speaker systems, allowing installers to select the model that best matches their zone requirements.

Explore the AtlasIED CLA402 for commercial installations requiring two amplifier channels instead of four.