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Atlas Sound AA400PHD
6-Channel Input, 400W Amplifier Mixer


The Atlas Sound AA400PHD is a six input channel mixer amplifier designed for distributed business paging and background music (BGM) systems...
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Atlas Sound AA400PHD
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The Atlas Sound AA400PHD is a six input channel mixer amplifier designed for distributed business paging and background music (BGM) systems, medium to large speech privacy systems, and in applications where music on hold (MOH) plus paging is required. With four microphone/line input and two stereo line inputs, the Atlas Sound AA400PHD will accommodate a variety of input sources including paging microphones, media players, and digital music receivers.

What Sets the AAPHD Series Apart?
The Atlas Sound AA400PHD includes a patent-pending automatic system test, the Push Here Diagnostic (PHD). The PHD button is designed to check the connected speaker lines for wiring and impedance errors. This test can be activated once all speakers are connected and the circuit automatically verifies that the attached speakers' tap settings do not exceed the amplifier's rated power, that no speakers are mistakenly tapped at 8Ohms, and the speaker wire is free from shorts. The unit also incorporates a Remote Input Selection and Remote Level Control feature that allows the integrator to use a remote wall plate (Atlas Sound model WPD-RISRL) and allow the user to select the input and adjust the volume from that wall plate up to 200 feet from the amplifier.

Atlas Sound's AA400PHD provides 400-watts output power into 25V, 70.7V, or 4O speaker systems. Rear panel DIP switch allows for creation of Zone 2 output mix using any or all of inputs 1-4. The unit can also be set-up to mute Inputs 2 through 6 on signal from Input 1 for paging applications where other input sources need to be muted during a page. Inputs 1-4 are either Mic or Line input selectable and Phantom Power is an option when using them as a microphone input.

Atlas Sound AA400PHD Features:

  • 400W into 25V/70.7V and 4Ohm Loads
  • Automated Diagnostic System Test (Push Here Diagnostic)
  • Four Balanced Mic/Line/Tel Inputs w/ Phantom Power
  • Three Unbalanced, Summing Line Level Inputs
  • Input Assignable Zone 2 Output
  • Remote Level Control
  • Remote Input Select (RIS)
  • Line Output
  • Preamp In for External Processors
  • Variable Mute Sensitivity Control for Input 1
  • Contact Closure Mute Terminals

Atlas Sound AA400PHD Specifications:

  • Frequency Response: 50Hz - 15kHz
  • Connector Type: 4 Position Phoenix 3.5mm Pitch
  • Power Output: Max. Average Power @ 50Hz-15kHz with.5% THD, 4Ohm 400W RMS
  • Dimensions (HxWxD): 3.66" x 16.54" x14.6" (93 x 420 x 422mm)
Atlas Sound WPD-RISRL Wall Plate for AA-PHD Mixer/Amplifiers
Atlas Sound WPD-RISRL Wall Plate for AA-PHD Mixer/Amplifiers
The Atlas Sound WPD-RISRL is a decora-style wall plate that is designed for use with the AA50PHD, AA100PHD, AA200PHD, or AA400PHD mixer amplifiers to use the remote input selection (RIS) feature. The WPD-RISRL features an audio source ...
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