Atlas Sound CP400 – Dual-Channel 400W Commercial Power Amplifier

Product Overview

The Atlas Sound CP400 is a dual-channel, 400-watt commercial power amplifier engineered for demanding contractor and systems integration applications. Supporting 25V, 70.7V, 100V constant voltage, and direct-coupled low-impedance outputs, the CP400 addresses the full range of distributed audio amplifier needs from large-scale 70V paging systems to high-SPL sound reinforcement. Its toroidal output transformers provide full electrical isolation, making it a dependable choice for commercial building audio, house of worship installations, and multi-zone background music systems.

Product Description

Designed specifically for professional AV contractors, the AtlasIED CP400 uses esoteric-grade toroidal power supply and output transformers selected for extended frequency response and long-term reliability. The transformer-isolated outputs deliver a frequency response of 30Hz to 50kHz (±3dB), and the toroidal design achieves electrical isolation that meets worldwide safety agency approvals—a feature historically reserved for higher-budget amplifier packages. Two fully independent channels deliver maximum channel separation and ultra-low distortion, whether the amplifier is configured in stereo, bridged mono, or parallel mode via the rear-panel switch.

Inputs accept balanced signals on both XLR connectors and terminal block barrier strips, with a loop-through feature on the male XLR inputs that simplifies daisy-chaining signal to additional amplifiers in larger zones. All output connections—including 25V, 70.7V, 100V constant voltage taps and direct-coupled 2, 4, and 8-ohm outputs—are mounted on rear-panel barrier strips with safety covers. Stepped rear-panel attenuators allow system installers to set gain levels securely, out of reach of end users. A variable-speed fan keeps the chassis cool during extended operation, and power-up muting prevents audible thumps when the unit comes online. The CP400 carries UL listing (UL60065), cETL, and CE certifications and is compatible with the full range of AtlasIED 70V and 100V paging speakers and in-ceiling loudspeakers available at Creation Networks.

Key Features

• Toroidal Output Transformers — Provide full electrical isolation, extended frequency response, and meet worldwide safety agency approvals.
• Multi-Voltage Constant Voltage Outputs — Supports 25V, 70.7V, and 100V constant voltage taps plus direct-coupled 2Ω, 4Ω, and 8Ω outputs on rear barrier strips.
• Stereo / Bridge / Parallel Modes — Rear-mounted switch selects operating mode, enabling up to 600W bridged mono at 4Ω for high-demand applications.
• Balanced XLR and Terminal Block Inputs — Accepts professional balanced signals on both XLR and screw-terminal barrier strip connections per channel.
• XLR Loop-Through — Male XLR loop-through on each channel input simplifies multi-amplifier signal distribution without additional splitters.
• Rear-Mounted Stepped Attenuators — Secure gain setting keeps level controls away from general access, reducing tampering in commercial installations.
• Variable-Speed Fan Cooling — Single variable-speed fan adjusts to thermal demand, balancing cooling efficiency with acoustic footprint in equipment rooms.
• Power-Up Muting — Suppresses turn-on transients to protect connected speakers and avoid disruption in occupied spaces.
• UL Listed (UL60065) — Certified for commercial installation; also carries cETL and CE marks for North American and international compliance.
• Rack-Mount Form Factor — Standard rack-mount chassis (5 3/16" height) fits in any professional equipment rack alongside signal processors and mixers.

Typical Applications

• House of worship distributed audio
• Commercial multi-zone background music systems
• Government and institutional paging systems
• Auditorium and multi-purpose room sound reinforcement
• Training room and conference room audio distribution
• Industrial facility public address with 70V speaker runs

Technical Specifications

Frequently Asked Questions

Q: What speaker systems is the CP400 compatible with?

A: The CP400 supports 25V, 70.7V, and 100V constant voltage speaker systems as well as direct-coupled 2Ω, 4Ω, and 8Ω loads. It is compatible with AtlasIED paging horns, in-ceiling speakers, and surface-mount speakers designed for 70V or 100V distributed audio systems.

Q: Can the CP400 be used in bridged mono mode for higher-power zones?

A: Yes. A rear-mounted switch selects stereo, bridged mono, or parallel operating modes. In bridged mono configuration, the CP400 delivers up to 600W into a 4Ω load or 500W into an 8Ω load—suitable for high-SPL reinforcement applications.

Q: Does the CP400 require an external output transformer?

A: No. The CP400 incorporates internal toroidal output transformers that provide full electrical isolation on 25V, 70.7V, and 100V outputs. There is no need to specify or budget for separate external transformers.

Q: How are gain levels secured in a commercial installation?

A: The CP400 uses stepped attenuators mounted on the rear panel. This placement keeps level controls accessible to installers and service personnel while keeping them away from general users in public-facing spaces.

Q: What are the rack-mount dimensions?

A: The CP400 has a height of 5 3/16" (13 cm). It is designed for standard 19" rack-mount installation alongside signal processors, DSPs, and other commercial audio equipment.

Q: What safety certifications does the CP400 carry?

A: The CP400 is UL Listed under UL60065 and carries cETL and CE certifications, meeting the requirements for commercial installations in the United States, Canada, and international markets.

Q: What is the warranty on the CP400?

A: AtlasIED covers the CP400 with a 36-month warranty from the date of purchase. For warranty service and support, contact Creation Networks at creationnetworks.net.