AA50PHD Owner’s Manual 50W Mixer Amplifier AA50PHD 50W Mixer Amplifier 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 –1– Specifications are subject to change without notice. AtlasSound.
AA50PHD Owner’s Manual 50W Mixer Amplifier Table of Contents Important Safety Instructions................................................................................................................... 3 Introduction............................................................................................................................................. 5 Key Features.....................................................................................................................................
AA50PHD Owner’s Manual 50W Mixer Amplifier Important Safety Instructions The lightning flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage “ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
AA50PHD Owner’s Manual 50W Mixer Amplifier • • • • • • • • • • WARNING When The Device Is In Use To prevent electric shock, do not remove the product cover as there are high voltage components inside. Refer all servicing to Atlas Sound. Should any of the following irregularities occur during use, immediately switch off the power, disconnect the power cord from the AC outlet and contact Atlas Sound.
AA50PHD Owner’s Manual 50W Mixer Amplifier Introduction Congratulations and thank you for purchasing the Atlas Sound AA50PHD 4 Input Mixer Amplifier. This new and innovative professional grade product has been designed from the ground up to include the important features that professional installation personnel require to meet or exceed their customer’s expectations.
AA50PHD Owner’s Manual 50W Mixer Amplifier Front Panel 3 7 4 5 8 2 6 1 1. Power Switch This push switch (On/Off) supplies power to the mixer amplifier. 2. Power Indicator This LED illuminates Blue when the power switch is turned On. 3. Signal Indicator When the signal LED illuminates Green, input signals are connected to the amplifier. The Signal LED is PRE the input level controls. 4.
AA50PHD Owner’s Manual 50W Mixer Amplifier Front Panel 7. Input 1-3 Level The rotary control varies the amplitude of the signal fed to the amplifier input. Turn clockwise to increase and counter-clockwise to decrease the signal level. 8. Master Level The Master Level control will raise or lower all the input channels together. A good starting point for setting gain structure is to set the Master Level control at the 12:00 position, and then adjust the individual channels one at a time.
AA50PHD Owner’s Manual 50W Mixer Amplifier Rear Panel 6. Input 4 Input 4 consists of 3.5mm stereo summing inputs suitable for connection to the output of CD/DVD players, etc. Note: The input level for this input is done at the source device. There is no input amplifier level control, only the Master Level. 7. Remote Mute Connector Shorting the Remote Mute terminals will mute the inputs that are assigned to receive the mute command.
AA50PHD Owner’s Manual 50W Mixer Amplifier Rear Panel 13. Pre Out The PRE OUT RCA port is POST the preamp mix bus but PRE the Master Level. This feature is used in two applications. A. Effects loop - Used in conjunction with the AMP IN connector, an effects loop can be created by connecting the PRE OUT jack to a device such as an equalizer or DSP and then back out to the AMP IN connector. B.
AA50PHD Owner’s Manual 50W Mixer Amplifier Rear Panel 16. Amplifier Outputs For loudspeaker connections, connect as follows or proceed to the setup section for typical wiring schemes. • COM - Speaker common or negative connection • 4Ω - Connect to direct coupled loudspeakers • 25V - Connect to transformer coupled loudspeakers • 70V - Connect to transformer coupled loudspeakers 17. Power Cord Connect this grounded power cord to 120VAC circuits only. Serious damage may result otherwise. 18.
AA50PHD Owner’s Manual 50W Mixer Amplifier Running a Self-Diagnostic Test using the PHD Feature Step 1 - Install the AAPHD Mixer amplifier, connect the input signals. Turn all levels to minimum. Do not attach the speaker system to the amp at this point. Step 2 - Install the 70V distributed speaker system per the design, double check speaker tap settings. The total power for all the speakers should NOT exceed the maximum power rating of the amplifier installed.
AA50PHD Owner’s Manual 50W Mixer Amplifier How To Trouble Shoot Your Speaker System If The Limit LED Is Illuminating LED OFF TEST PASS The Limit LED should never be constantly illuminated or damage may occur to the amplifier or sound system. If the Limit LED comes on steadily during use or during the PHD test there are a few common fault conditions to check if using a 70V distributed audio system. A. Check each speaker setting to make sure it is not set to a 4, 8 or 16 ohm setting.
AA50PHD Owner’s Manual 50W Mixer Amplifier How To Trouble Shoot Your Speaker System If The Limit LED Is Illuminating C. If the first two check points are OK, there is probably a short in the wiring of the speaker system. Common causes include 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.
AA50PHD Owner’s Manual 50W Mixer Amplifier Connecting a Remote Level Control with Remote Input Select (RIS) Remote location of a level control can be accomplished via the Remote Level control 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.
AA50PHD Owner’s Manual 50W Mixer Amplifier Example 2 - Using a WPD-RISRL (Remote Input Select (RIS) with Remote Level) The AAPHD Series (Except AA30PHD) features a unique interface 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.
AA50PHD Owner’s Manual 50W Mixer Amplifier Wiring the AAPHD Series Amplifier • Mic/Line Input - Use 2 conductor w/ shield for low level signals; 20-22 gauge stranded wire is best. Maintain the proper polarity, + to +, – to – , and shield to ground. • Unbalanced Inputs and Outputs - Pre-made RCA cables can be purchased from Atlas Sound to simplify interconnection to external devices. • • Zone 2 Out - Use 2 conductor, 20-22 gauge, shielded is best.
AA50PHD Owner’s Manual 50W Mixer Amplifier Block Diagram 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 – 17 – Specifications are subject to change without notice. AtlasSound.
AA50PHD Owner’s Manual 50W Mixer Amplifier 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, 4Ω 50W RMS Transformer Outputs 25V 50W RMS 70.
AA50PHD Owner’s Manual 50W Mixer Amplifier AA50PHD Specifications Outputs Main Transformer Coupled, Balanced, 4Ω, 25V, and 70.7V. Class 2 Rated, Removable 4 Position PHX 5.08mm pitch, Accepts up to 12 Gauge Wire, 12A Rating Zone 2 Unbalanced 600Ω / 10kΩ, Max 1.0V Out, Removable 2 Position PHX 3.
AA50PHD Owner’s Manual 50W Mixer Amplifier Limited Warranty All products manufactured by Atlas Sound are warranted to the original dealer/installer, industrial or commercial purchaser to be free from defects in material and workmanship and to be in compliance with our published specifications, if any.
