Atlas Sound AA50PHD 4-Input 50W BGM Mixer Amplifier

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Atlas Sound SKU: AA50PHD
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Sale price$445.99 Regular price$554.99


The AA50PHD is a four input channel mixer amplifier designed for distributed business paging and background music (BGM) systems, small to medium speech privacy systems, and in applications where music on hold (MOH) plus paging is required. With one microphone/line input and three stereo line inputs, the AA50PHD will accommodate a variety of input sources including paging microphones, media players, and digital music receivers. The AA50PHD includes a patent pending automatic system test, the Push Here Diagnostic (PHD).

What Sets the AAPHD Series Apart?

The PHD button is designed to check the connected loudspeaker lines for wiring and impedance errors. This test can be activated once all loudspeakers are connected and the circuit automatically verifies that the attached loudspeakers' tap settings do not exceed the amplifier's rated power, no loudspeakers are mistakenly tapped at 8?, and the loudspeaker 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 (AtlasIED 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.

The AA50PHD provides 50-watts output power into 25V, 70.7V, or 4? loudspeaker systems. Rear panel DIP switch allows for creation of Zone 2 output using either Input 1, 2, 3 or 4. Unit can also be set-up to mute Inputs 2, 3, and 4 based on signal from Input 1 for paging applications where other input sources need to be muted during a page. Input 1 is either Mic or Line input selectable and Phantom Power is an option when using Input 1 Mic input.

  • 50W into 25V/70.7V and 4 Ohms Loads
  • 4x Inputs with PHX and RCA Options
  • Rear-Mounted DIP Switch for Mute Options
  • Preamp for External Processing
  • Stereo-Summed Inputs
Form Factor/Type Tabletop
Number of Channels 3
Amplifier Power Rating 4 Ohms:
50 W RMS
Load Impedance / Voltage 25 / 70 V
4 Ohms
Frequency Response 80 Hz to 15 kHz ±3 dB
Input Sensitivity Mic:
5 mV
316 mV / -10 dBV
I/O Impedance RCA Amplifier Input:
600 Ohms
Block Zone Output:
600 Ohms (Unbalanced)
10 Kilohms
RCA Preamp Output:
150 Ohms (Unbalanced)
Mic/Line Input:
1200 Ohms
Aux Input:
10 Kilohms
RCA Input:
10 Kilohms (Unbalanced)
Output Level Zone Output:
1 V Max (Unbalanced)
SNR Mic:
> 55 dB
> 55 dB
> 75 dB
THD+N < 1% (1 kHz, at Rated Power)
Signal Processing
EQ Treble: ±6 dB at 10 kHz
Bass: ±6 dB at 100 Hz
Audio I/O 1 x Block 3-Pin Balanced Mic/Line Input
1 x Stereo RCA Unbalanced Aux Input
1 x 1/8" / 3.5 mm Unbalanced Aux Input
1 x RCA Unbalanced Amplifier Input
1 x RCA Unbalanced Preamp Output
Other I/O 1 x Block 2-Pin Mute
2 x Block 4-Pin Remote
Speaker Outputs 1 x Block 4-Pin Balanced
1 x Block 2-Pin Unbalanced Zone
Phantom Power 24 VDC
AC Input Power 120 VAC, 60 Hz
AC Power Connector 1 x Hardwired Cord / NEMA 5-20
Current Consumption 0.24 A (Idle)
1.52 A (1/3 Power)
2.37 A (Max)
Power Consumption 14 W (Idle)
146 W (1/3 Power)
242 W (Max)
Dimensions 8.3 x 3.7 x 10.9" / 210.0 x 93.0 x 276.0 mm
Weight 10 lb / 4.5 kg

At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.

  • Most in-stock orders placed Monday-Friday before 1PM PST ship the same day. Orders placed after 1PM will ship the next day of business. General restrictions apply; please see our full shipping policy here.
  • We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.

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