The AA400PHD 400W Mixer Amplifier from Atlas Sound is 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 inputs and three stereo line inputs, the AA400PHD Amp can accommodate a variety of input sources including paging microphones, media players, and digital music receivers.

The AA400PHD Amp includes the Push Here Diagnostic (PHD), an automatic system test. The PHD button is designed to check the connected speaker lines for wiring and impedance errors. The unit also incorporates remote input selection and remote level control features that allow the integrator to use the WPD-RISRL remote wall plate (not included) and select the input and adjust the volume from that wall plate up to 200’ from the amplifier.

The AA400PHD Amp provides 400W output power into 25V, 70.7V, or 4 ohm speaker systems. Rear panel DIP switch allows for creation of Zone 2 output mix using any or all of inputs 1-4. 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 to 4 are either Mic or Line selectable and Phantom Power is an option when using them as a microphone input.

• 400W into 25/70.7V and 4 ohm loads
• Automated diagnostic system test (push here diagnostic)
• 4 balanced Mic/Line/Tel inputs with phantom power
• 3 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

• Distributed business paging and background music (BGM) systems
• Small to medium speech privacy systems
• Applications where music on hold (MOH) plus paging is required

Related Questions and Answers

Q: 1. why do the speakers have a background buzz?

A: It could be a number of things causing buzzing in your speakers. You will want to make sure that you are using speaker cable first. Then make sure that your power source is properly grounded. And make sure that you are using the correct terminal for your speakers (4 ohm, 8ohm, 70v, 25v).

Q: 2. Is this amp (TOA A-2240) rack mountable? If so, what is the product number for brackets?

A: There is not a rack kit available, but you could use a rack shelf.

Q: 3. Why Is there no 70 volt output on my p912mk2?

A: The TOA P-912MKII features 4 and 8 ohm outputs as well as a 25V and 70v output on screw terminals. Please refer to page 6 of the manual for the location of this connection. http://bit.ly/1M5Yfvh

Q: 4. Is this considered a multi zone unit, but how can it be when there is only one output speaker?

A: This Amp is considered 3 inputs and one output. The 3 inputs are: One Microphone, second selectable Mic/Line, the third is a line level. The output is one you have the choice of using 4 Ohm, 25V, or 70V, on 25 and 70V you can use multiple speakers 70V rated in a daisy chain configuration, as long as you don't exceed the 35W limit of the Amp.

Q: 5. Hi, Does the amp include the power supply?

A: The Atlas Sound Time Saving Devices TSD-PA252G does not ship with power supply. It must be purchased separately.

Q: 6. Does this support 70volt systems without the need for an external transformer?

A: This unit will support 70 volt speakers, providing 120 watts of power to 2 zones.

Q: 7. does this model supply phantom power required by some mikes?

A: The TOA A-912MK2 is a modular unit that requires the purchase of individual input modules for mic connectivity. The M-01F features a female XLR mic input that does supply up to 22VDC phantom power.

Q: 8. Where is the AUX port to hook up to a mobile device to stream music?

A: Line 2 and Line 3 inputs have RCA style inputs as well as bare wire.

Q: 9. Can this be used just as a center speaker?

A: The Bowers & Wilkins Panorama 3 400W 3.1.2-Channel Soundbar cannot be used as only a center-channel speaker, as it is made to take full audio from the audio output of the TV.

Q: 10. How do I get more paging volume?

A: If you've maxed out the volume knob on the input and master output, there are few things you can look at. Consider what the speaker taps are set to, also speaker sensitivity has a direct impact on how loud the speaker will sound. Take a look at the source. Is it mic or line? All of these things affect the level. If you've addressed these concerns, and your system isn't loud enough, chances are you may need more power; either on the speaker side, or the amp side.