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Atlas AA50PHD Owner'S Manual Download Page 18

 AtlasSound.com 

– 18 – 

Owner’s Manual

AA50PHD

50W Mixer Amplifier

1601 Jack McKay Blvd. • Ennis, Texas 75119  U.S.A.

Telephone: 800.876.3333 • Fax: 800.765.3435

AA50PHD Specifications

Type 

 Mixer  Amplifier

RoHS Compliant 

Yes

Safety Listings  

ETL (UL 60065 Standard)

 

Electrical Specifications

Power Output 

Max. Average Power @ 80Hz-15kHz with 1% THD, 4

Ω

 50W RMS

Transformer Outputs  

25V 

  50W RMS

 

70.7V 

  50W RMS

 4

Ω

 

  50W RMS

 

Front Panel

Power Switch 

Push Type

Indicators 

Signal, Peak, Limit, Power

PHD Test Circuit 

Push Momentary

Level Controls 

Master, Inputs 1 - 3

 

Rear Panel

Inputs 

Mic / Line Balanced Qty 1, 3 Position PHX Type. 3.5mm Pitch

 

Auxiliary Unbalanced Qty 2, RCA

 

Auxiliary Unbalanced Qty 1, 3.5mm

 

Amp In: Unbalanced RCA 600

Ω

Tone Controls 

Bass 

±6dB @ 100Hz

 

Treble 

±6dB @ 10kHz

Mute 

VOX Sensitivity: Pot Rotary, Range 500uV - 200mV 

 

Remote Mute: Contact Closure, 2 Position Phoenix, 3.5mm Pitch

Remote Level

Type 

10V DCV Return

Connector 

4 Position Phoenix 3.5mm pitch

Control Port 

Input 2, 3, 4 or Master

Supply Port 

10VDC Send

Ground Port 

Ground

Remote Input Select (RIS)

Type 

Ground Activated

Connector 

4 Position Phoenix 3.5mm pitch

Inputs Controlled 

2, 3, 4

Control Switch Functions

Zone 2 Assign 

Inputs 1, 2, 3, 4

Mute Receive 

Inputs 2, 3, 4

Phantom Power 

Input 1

Mic line Select 

Input 1

Summary of Contents for AA50PHD

Page 1: ...d com Specifications are subject to change without notice Owner s Manual AA50PHD 50W Mixer Amplifier 1601 Jack McKay Blvd Ennis Texas 75119 U S A Telephone 800 876 3333 Fax 800 765 3435 AA50PHD 50W Mixer Amplifier ...

Page 2: ...3 Introduction 5 Key Features 5 Applications 5 Front Panel Description 6 Rear Panel Description 7 PHD Diagnostic System Test 10 Common Amplifier Failure Conditions 10 Trouble Shooting the Fault LED 12 How to Calculate Load Impedance 13 Remote Level Control 14 Remote Input Select RIS 15 Wiring the AA50PHD 16 Level Control Security Cover Option 16 Block Diagram 17 Specifications 18 Warranty 20 ...

Page 3: ...amaged liquid has been spilled or objects have fallen into the device the device has been exposed to rain or moisture does not operate normally or has been dropped 15 WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture Avertissement pour réduire le risque d incendie ou de choc électrique ne pas exposer cet appareil sous la pluie et l humidité 16 Th...

Page 4: ...wer cord in close proximity to heaters and do not place heavy objects on the power cord including the product itself doing so may result in fire or electrical shock Ensure that the safety ground terminal is connected to a proper ground Never connect the ground to a gas pipe as a catastrophic disaster may result Be sure the installation of the product is stable avoid slanted surfaces as the product...

Page 5: ... Sound AA50PHD will provide years of service and flexibility in background music and paging applications Key Features 50W Into 25V 70 7V and 4Ω Loads Automated Diagnostic System Test Push Here Diagnostic Balanced Mic Line Tel Input w Phantom Power Three Unbalanced Summing Line Level Inputs Input Assignable Zone 2 Output Remote Level Control Remote Input Select RIS Preamp Out Amp In for External Pr...

Page 6: ...hen testing the system using the PHD feature for proper wiring and amplifier loading this LED will illuminate Yellow if a fault is sensed in the audio speaker system See Using the PHD Load Impedance Testing System B Excessive Current Draw Limit Indicator Will illuminate Yellow when the amplifier is consuming excessive current At that point a current limiting circuit is activated reducing the outpu...

Page 7: ...ntrol Normally set at the 12 00 position rotating clockwise will increase boost treble frequencies by 6dB at 10kHz Rotating counter clockwise from the 12 00 position will decrease cut treble frequencies by 6dB at 10kHz 3 Input 1 Balanced Microphone or Line level signals connect to the and G terminals To select between Mic or Line input levels refer to the DIP switch chart on the rear of the amplif...

Page 8: ...gger the mute circuits If it is not calibrated properly the mute may not be triggered when a weak voice vs a strong voice uses the mic 9 Zone 2 Output Port This terminal provides a 600Ω unbalanced output that is typically connected to a PBX music on hold port also known as MOH Inputs are assigned to the Zone 2 bus via switch associated with the input Note 10kΩ output impedance is available via the...

Page 9: ...ne 2 Output terminals The signal routed is PRE the front panel level control DP SW 4 Zone 2 Assign Input 1 When ON Input 1 signal will be routed to the Zone 2 Output terminals The signal routed is PRE the front panel level control DP SW 5 Mute Receive Input 4 When ON Input 4 signals will be muted if a signal is present on Input 1 or if the Remote Mute Terminals are shorted together DP SW 6 Mute Re...

Page 10: ...istributed audio speaker system There are a few common failure points that can occur during system installation that are listed below Common Amplifier Failure Conditions also see How to Trouble Shoot Your Speaker System if the Limit LED is Illuminating 1 A short in the speaker wiring 2 Improper load selection or power tap setting on 70V speaker systems It is very common when using many speakers to...

Page 11: ...er On Step 5 Before starting the system Diagnostic test Make sure no people are present or near the speakers during the diagnostic test without taking proper precautions A 1 2 watt test tone will be present at each speaker The audible SPL level will be based on the power tap setting at each speaker and sensitivity specification of the speaker The audible SPL level may be alarming to some people We...

Page 12: ...t to a 4 8 or 16 ohm setting If one speaker is set to one of these settings it will cause a fault condition A simple and quick way to test this besides visually looking at each speaker is to have a second technician walk the area where the speakers are installed while the PHD test is applied and listen for a speaker that is audibly way louder that the other speakers The louder speaker most likely ...

Page 13: ...staples through the wire and the wire cut by metal conduit causing a short to ground D Excessive Current Draw The Limit LED will illuminate Yellow when the amplifier is consuming excessive current The most likely cause for the fault is an incorrect load impedance connected to the amplifier The LED should not steadily illuminate if a proper load is applied Note An occasional LED flash is okay durin...

Page 14: ...rol port You can control Input 1 or Inputs 2 3 and 4 The AAPHD series remote level design is based on 10VDC return VCA type topology Connections to a 10K pot require three conductors with a minimum of 22 gauge wire the 10K pot can be placed up to 1000ft away The return ports can be paralleled together if one pot will control all inputs Below are Illustrations on different ways to configure a remot...

Page 15: ...face for remote selection of 3 inputs without running audio signal from the amplifier This is ideal because the result is clean audio with no chance of picking up interference It is intended to be used with the optional wall controller WPD RISRL from Atlas Sound The WPD RISRL allows selection of three inputs not Input 1 with ability to adjust the level for each input selected The WPD RISRL also fe...

Page 16: ...ies amplifiers optional security covers are available which take the place of the front panel knobs After the amp has been installed and is operating as desired grasp the front panel knobs and pull straight out from the front panel Replace the knobs with security covers Atlas Sound part number AAVCC 5 available in quantities of 5 Front Panel Knob Security Cover or Signal Peak Master Level 5 6 4 3 ...

Page 17: ...tlasSound com Specifications are subject to change without notice Owner s Manual AA50PHD 50W Mixer Amplifier 1601 Jack McKay Blvd Ennis Texas 75119 U S A Telephone 800 876 3333 Fax 800 765 3435 Block Diagram ...

Page 18: ... Inputs 1 3 Rear Panel Inputs Mic Line Balanced Qty 1 3 Position PHX Type 3 5mm Pitch Auxiliary Unbalanced Qty 2 RCA Auxiliary Unbalanced Qty 1 3 5mm Amp In Unbalanced RCA 600Ω Tone Controls Bass 6dB 100Hz Treble 6dB 10kHz Mute VOX Sensitivity Pot Rotary Range 500uV 200mV Remote Mute Contact Closure 2 Position Phoenix 3 5mm Pitch Remote Level Type 10V DCV Return Connector 4 Position Phoenix 3 5mm ...

Page 19: ...RCA Unbalanced 150Ω Technical Data Inputs Total Qty 4 Frequency Response 80Hz 15kHz 3dB Thd N 1 or Less at 1kHz Rated Output Input Sensitivity Impedance Input 1 Mic Mode 5mv No Trim 1200Ω Input 1 Line Mode 316mV 10dBV 1200Ω Input 2 3 4 316mV 10dBV 10kΩ Input 4 3 5mm Summed 316mV 10dBV 10kΩ Signal To Noise Ratio Mic 55dB Line 55dB Telephone 55dB Input 3 4 75dB Phantom Power 24VDC Power Requirements...

Page 20: ...returns must comply with our returns policy set forth below When products returned to Atlas Sound do not qualify for repair or replacement under our warranty repairs may be performed at prevailing costs for material and labor unless there is included with the returned product s a written request for an estimate of repair costs before any nonwarranty work is performed In the event of replacement or...

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