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ATC LOUDSPEAKERS

R4-150 Pro

Power Amplifiers

4-channel power amplifier, 150W per channel, 5U rackmount, balanced XLR inputs, NL4 outputs, remote trigger, optimized for immersive audio and passive monitors

$7,099.00 CAD
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Description

The ATC R4-150 Pro is a 4-channel rackmount power amplifier engineered to deliver uncompromising audio performance for immersive audio, surround monitoring, and multi-speaker professional installations. Purpose-built to power the new SSM12i Pro and SSM25i Pro shallow-mount loudspeakers, this amplifier ensures that every channel in your monitoring setup receives clean, accurate, and dynamic amplification, even under the most demanding mixing conditions.

Occupying just 5U of rack space, the R4-150 Pro delivers 150 watts per channel (continuous) across four channels, offering ample headroom and tight control over a wide frequency range. Based on the highly respected P1 Pro amplifier topology, it shares the same audiophile-grade design principles while providing a more efficient, space-saving solution for multi-speaker configurations, such as Dolby Atmos® 7.1.4, 9.1.6, or beyond.

Connectivity is straightforward and professional: the unit includes four balanced XLR inputs and four Neutrik NL4 outputs, ensuring reliable, secure speaker connections. A 12V trigger input allows the R4-150 Pro to be powered on and off remotely, integrating seamlessly into modern studio workflows.

Features

High-Power 4-Channel Design
Delivers 150W continuous output per channel, ideal for immersive and multichannel studio setups.

Space-Saving 5U Rack Format
Consolidates four channels into one compact 5U chassis, saving rack space compared to dual stereo amps.

Built for Dynamic Audio Content
Designed to handle the demands of modern surround and immersive mixes with consistent, clean power.

Balanced Connectivity
Includes 4 balanced XLR inputs and 4 Neutrik NL4 speaker outputs for secure, professional connections.

Remote Power Control
Features a trigger input for remote on/off functionality to integrate seamlessly into studio systems.

Reliable Performance from ATC
Shares trusted amplifier technology with the ATC P1 Pro, ensuring high fidelity and durability.

Perfect Match for SSM Series
Optimized to drive the SSM12i Pro and SSM25i Pro loudspeakers at full potential.

Specifications

General Specifications
Model: R4-150 Pro
Device Type: 4-Channel Rackmount Power Amplifier
Amplifier Class: AB
Chassis Size: 5U / 19" rackmount
Continuous Power Output: 150 W per channel into 8 Ω
Channel Count: 4
Design Origin: Shares amplifier technology with ATC P1 Pro
Target Use: Powers passive monitors in immersive audio systems (e.g., SSM12i Pro, SSM25i Pro)

Inputs & Outputs
Audio Inputs: 4 × Balanced XLR
Speaker Outputs: 4 × Neutrik NL4 connectors
Trigger Input: Yes (for remote power control)

Application & Integration
Use Case: Designed for Dolby Atmos, multichannel immersive setups
Channel Pairing: Powers up to two SSM25i Pro monitors or four SSM12i Pro monitors
Space Efficiency: 5U chassis replaces two P1 Pro units, saving 2U in rack space
Installation: Suitable for professional studios and post-production environments

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