AtlasIED CLA402 400W 2-Channel Power Amplifier with Power Share

The AtlasIED CLA402 is a compact, professional 400-watt, 2-channel Class D power amplifier designed for commercial audio installations requiring flexible power distribution and support for multiple speaker configurations. Featuring AtlasIED's innovative Power Share technology, the CLA402 allows installers to allocate amplifier power between two independently configurable channels, making it an excellent choice for distributed audio, paging, background music, and multi-zone sound systems.

Unlike traditional amplifiers with fixed power ratings per channel, the CLA402 provides flexible power allocation while supporting both low-impedance speaker systems (2Ω, 4Ω, and 8Ω) and constant-voltage systems (25V, 70.7V, and 100V).

Each amplifier channel can be configured independently, allowing a single CLA402 to support different speaker system requirements within the same installation.

With a compact 1RU half-rack design, energy-efficient Class D amplification, rear-panel configuration controls, and automatic cooling assistance, the CLA402 delivers professional audio performance while minimizing rack space and power consumption.

Whether you're designing a restaurant background music system, commercial paging installation, conference room, or multi-zone audio system, the AtlasIED CLA402 provides flexible amplification for a wide range of commercial applications.

Flexible 400-Watt Power Share Technology

One of the most important features of the AtlasIED CLA402 is its Power Share technology, which allows the amplifier's available 400 watts to be distributed between its two output channels.

Rather than limiting both channels to a fixed 200 watts, installers can select different power allocations based on the requirements of each speaker zone.

Available Power Share configurations include:

Channel 1	Channel 2	Total Available Power
200W	200W	400W
350W	50W	400W
300W	100W	400W
250W	150W	400W

This flexibility is particularly useful when one zone requires significantly more amplifier power than another.

For example, a commercial installation may require additional power for a large dining area while a smaller office or reception area needs considerably less.

The CLA402 allows installers to distribute the available amplifier capacity accordingly without requiring separate amplifiers for each area.

Power Share provides up to 350 watts on an individual channel, depending on the selected configuration.

Supports Low-Impedance and Constant-Voltage Speakers

The AtlasIED CLA402 supports a wide range of commercial speaker configurations, making it suitable for both new installations and system upgrades.

Each amplifier channel can be independently configured for:

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

This versatility allows integrators to use one amplifier for installations with different speaker requirements.

For example, one channel can be configured for a commercial 70.7V speaker system while the other is configured for compatible low-impedance speakers.

Independent channel configuration makes the CLA402 especially useful for mixed-system installations where replacing existing speakers would be unnecessary or impractical.

Speaker loads and amplifier power allocations must be configured according to AtlasIED's installation requirements.

High-Efficiency Class D Amplification

The CLA402 uses Class D amplifier technology to deliver efficient power amplification in a compact chassis.

Its design helps reduce unnecessary energy consumption while supporting reliable operation in commercial environments.

The amplifier incorporates a switch-mode, auto-sensing power supply designed to accommodate supported input power conditions.

Combined with its efficient output stage, the CLA402 provides a practical amplification solution for installations where equipment space, operating efficiency, and long-term reliability are important.

Energy-Efficient Operation with Less Than 1W Standby Consumption

The AtlasIED CLA402 is designed to minimize energy consumption when the amplifier is not actively operating.

Its energy-efficient design includes:

• Less than 1 watt of standby power consumption
• ENERGY STAR-compliant operation
• Efficient Class D amplification
• Automatic cooling assistance based on operating conditions

These features make the CLA402 a practical choice for commercial installations where equipment may remain powered for extended periods.

Reduced standby consumption can also help limit unnecessary energy use across multi-amplifier installations.

Convection Cooling with Automatic Fan Assistance

The CLA402 incorporates a thermal management system designed to balance cooling performance with quiet operation.

During idle conditions, the amplifier uses convection cooling.

When audio activity is detected, the cooling system can activate variable-speed fan assistance as required.

This approach helps reduce unnecessary fan operation while maintaining appropriate cooling during amplifier use.

The thermal-optimized design makes the CLA402 suitable for commercial equipment racks, conference rooms, and other professional audio installations.

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

Independent Channel Configuration and Rear-Panel Controls

The AtlasIED CLA402 provides convenient configuration through rear-panel DIP switches.

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

Additional control features include:

• Independent channel configuration
• Rear-panel level attenuators
• Remote level control capabilities
• Priority mute functionality
• GPI connections for supported control functions

These features provide flexibility for installations requiring local adjustment or integration with external control systems.

Priority mute functionality can be useful in paging applications where background audio must be interrupted for announcements.

Compact 1RU Half-Rack Design

The CLA402 delivers 400 watts of total amplifier capacity in a compact 1RU half-rack chassis.

Its space-saving construction is ideal for installations where equipment rack space is limited.

The amplifier measures approximately:

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

Its compact footprint makes it suitable for commercial equipment racks, AV cabinets, and other installations requiring professional amplification without a full-width amplifier chassis.

Appropriate mounting accessories and installation clearances should be selected according to the application.

Designed for Commercial Multi-Zone Audio Systems

The AtlasIED CLA402 is particularly useful for installations where different audio zones require different amplifier power levels.

Its combination of Power Share technology and independently configurable outputs makes it suitable for:

• Restaurants and cafés
• Retail stores
• Hotels and hospitality facilities
• Conference and meeting rooms
• Corporate offices
• Educational facilities
• Houses of worship
• Commercial paging systems
• Background and foreground music
• Mixed-impedance speaker installations

The amplifier's flexible architecture helps simplify system design while supporting different speaker configurations.

AtlasIED CLA402 Key Features

• Professional 400-watt, 2-channel Class D amplifier
• AtlasIED Power Share technology
• Flexible power distribution between two channels
• Up to 350 watts available on one channel
• Supports 2Ω, 4Ω, and 8Ω speaker systems
• Supports 25V, 70.7V, and 100V distributed audio systems
• Independently configurable amplifier channels
• Rear-panel DIP switch configuration
• Rear-panel level attenuators
• Remote level control capability
• Priority mute functionality
• GPI control connections
• Switch-mode, auto-sensing power supply
• Energy-efficient operation
• Less than 1W standby power consumption
• ENERGY STAR-compliant design
• Convection cooling with variable-speed fan assistance
• Compact 1RU half-rack chassis
• 36-month manufacturer warranty

AtlasIED CLA402 Technical Specifications

Specification	Details
Manufacturer	AtlasIED
Model	CLA402
Product Type	2-Channel Power Amplifier
Amplifier Topology	Class D
Total Output Power	400 Watts
Number of Channels	2
Number of Inputs	2
Power Share Configurations	200W/200W, 350W/50W, 300W/100W, 250W/150W
Maximum Single-Channel Allocation	350 Watts
Low-Impedance Output Modes	2Ω, 4Ω, 8Ω
Constant-Voltage Output Modes	25V, 70.7V, 100V
GPI Ports	5, 3.5mm Euroblock
Speaker Output Terminals	2 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 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"
Unit Weight	5.9 lbs.
Shipping Weight	8.11 lbs.
Manufacturer Warranty	36 Months from Date of Purchase

Typical Applications

Restaurants and Hospitality

Power separate dining areas, bars, reception spaces, and other audio zones with independently configured amplifier channels.

Retail Background Music

Support commercial background music systems using 70.7V distributed speakers or compatible low-impedance loudspeakers.

Conference and Meeting Rooms

Provide compact, efficient amplification for professional presentation and meeting room audio systems.

Educational Facilities

Support paging and background audio in classrooms, administrative offices, and other institutional environments.

Commercial Paging Systems

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

Mixed-Impedance Installations

Configure individual channels for different speaker requirements, including combinations of low-impedance and constant-voltage systems.

Why Buy the AtlasIED CLA402 from Audio Supply?

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

The AtlasIED CLA402 provides flexible 400-watt amplification, independent channel configuration, and Power Share technology for installations requiring efficient power distribution across multiple speaker zones.

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