ATLAS IED AA400PHD 6-INPUT, 400 WATT MIXER AMPLIFIER WITH PHD

Atlas Sound AA400PHD 400-Watt Mixer Amplifier for Distributed Paging, Background Music, and Speech Privacy Systems

The Atlas Sound AA400PHD is a high-performance six-input mixer amplifier specifically engineered for distributed business paging, background music (BGM) systems, medium to large-scale speech privacy solutions, and applications demanding music-on-hold (MOH) functionality alongside paging.

This versatile amplifier features four balanced microphone/line/tel inputs—with selectable phantom power—and three unbalanced summing line-level inputs, accommodating a wide range of audio sources including paging microphones, media players, and digital music receivers. Delivering 400 watts of power into 25V, 70.7V, or 4Ω speaker loads, the AA400PHD ensures robust and clear audio performance tailored to professional environments.

A key innovation of the AA400PHD is the patent-pending Push Here Diagnostic (PHD) automated system test, designed to verify speaker line wiring, detect impedance discrepancies, and identify shorts. This diagnostic capability significantly simplifies installation and maintenance, enhancing system reliability.

Additional features include remote input selection and volume control via the compatible Atlas Sound WPD-RISRL wall plate, enabling convenient user control from distances up to 200 feet. The rear panel DIP switch provides flexible configuration for a Zone 2 output mix derived from any combination of inputs 1 through 4. The unit also supports priority muting, allowing inputs 2 through 6 to be muted upon paging from Input 1, ensuring clear and uninterrupted announcements.

Key Features:

• 400 watts output into 25V, 70.7V, and 4Ω speaker systems

• Patent-pending Push Here Diagnostic (PHD) automated system test for speaker line integrity

• Four balanced microphone/line/tel inputs with selectable phantom power

• Three unbalanced summing line-level inputs

• DIP switch-configurable Zone 2 output with input assignability

• Remote Input Select (RIS) and Remote Level Control (RLC) support via wall plate

• Line output and preamplifier input for integration with external processing equipment

• Variable mute sensitivity control on Input 1 for priority paging override

• Contact closure mute terminals for seamless integration with external systems

• Optional rack mount kit (Model AARMK2-0) available for streamlined installation

The Atlas Sound AA400PHD is ideally suited for demanding commercial audio environments requiring dependable, high-fidelity audio distribution combined with advanced diagnostic and remote control capabilities.