Atlas Sound HPA1204 Four-Channel 1200W Commercial Amplifier

Product Overview

The Atlas Sound HPA1204 is a four-channel 1200W commercial amplifier built for 70V/100V distributed audio systems and professional sound reinforcement installations that demand high output across multiple impedance loads. Each of its four channels delivers 300 watts at 70.7V, 100V, 8 ohms, or 4 ohms, giving AV integrators a single platform for large paging systems, background music distribution, and high-SPL program audio. A rear-panel accessory slot accepts an optional Dante four-channel digital audio interface for networked AV system integration. Generation II Class D output topology keeps the unit compact and efficient without sacrificing sound quality.

Product Description

The HPA Series was developed for commercial audio installation projects where amplifier density, efficiency, and load flexibility matter. The HPA1204 is notably compact and lightweight compared with other amplifiers delivering similar power, occupying just two rack units at 21.4 pounds. Its Generation II Class D output stage provides the efficiency expected of switching amplification with sound quality comparable to Class AB designs, while the switch-mode, global auto-sensing power supply maintains stable output during fluctuating power conditions — a practical benefit in facilities with inconsistent mains power.

For installers, the HPA1204 includes front-panel detented level controls behind a security cover to prevent tampering in shared spaces, balanced Euroblock line inputs, remote turn-on, and fault reporting for proactive maintenance. The output stage uses a low-resistance, direct-coupled thermal transfer design that maintains optimal operating temperature across all loads and output levels, supported by a single variable-speed fan. The amplifier meets Energy Star standards and draws only 1W in standby, which helps facilities teams meet energy efficiency targets in commercial AV deployments. Whether the project is a campus-wide constant-voltage paging system or a high-SPL auditorium reinforcement system, the HPA1204 covers both from one chassis. See our complete AtlasIED product lineup for compatible 70V speakers and rack accessories.

Key Features

• 4 x 300W Output — Four channels each deliver 300 watts at 70.7V, 100V, 8 ohms, or 4 ohms for consistent power across any commercial speaker load.
• Generation II Class D Topology — High-efficiency switching output with sound quality comparable to Class AB amplifiers in a compact 2RU chassis.
• Dante Accessory Card Slot — Rear-panel slot accepts an optional four-channel Dante digital audio interface for audio-over-IP integration.
• Auto-Sensing Universal Power Supply — Switch-mode global supply maintains stable output during fluctuating power conditions on 120V or 230V mains.
• Detented Attenuators with Security Cover — Front-panel level controls are protected from unauthorized adjustment in public and shared facilities.
• Fault Reporting and Remote Turn-On — Integration-friendly control and monitoring features support managed commercial AV systems.
• Energy Star Compliant — Draws only 1W in standby mode, reducing operating cost in always-installed amplifier racks.
• Thermal Transfer Output Design — Low-resistance direct-coupled cooling with a variable-speed fan maintains optimal temperature at all output levels.

Typical Applications

• Auditorium and all-hands room sound reinforcement
• House of worship main system amplification
• Government space and commercial meeting space distributed audio
• Multi-purpose room and training room AV systems
• Conference room and boardroom program audio

Technical Specifications

Frequently Asked Questions

Can the HPA1204 mix 70V and low-impedance speaker loads?
Yes. Each channel operates at 70.7V, 100V, 8 ohms, or 4 ohms, so one amplifier can drive distributed ceiling speaker lines and low-impedance surface or foreground speakers.

Does the HPA1204 support Dante network audio?
Dante is optional. The rear-panel accessory card slot accepts a four-channel Dante digital audio interface for direct connection to an audio-over-IP network.

How loud is the cooling and is it rack-friendly?
The HPA1204 uses a single variable-speed fan and occupies 2RU in a standard 19-inch rack at a 15-inch depth, with 1486 BTU heat output at full drive for HVAC planning.

What input connections does it use?
Balanced Euroblock line inputs with terminal block and Phoenix-style output connectors, the standard for fixed commercial installation wiring.

Is it energy efficient for an always-on installation?
Yes. The HPA1204 meets Energy Star standards and draws only 1W in standby, and remote turn-on lets a control system power it only when needed.

What warranty and support come with purchase?
AtlasIED warrants the HPA1204 for 36 months from the date of purchase. Creation Networks is an authorized dealer and can assist with system design, amplifier sizing, and volume project pricing.