Atlas AA240 Owner's Manual
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Atlas AA240 Owner's Manual

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Owner's Manual
AA240 Mixer Amplifier
AA240 Atlas Sound Mixer Amplifier
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 1 –
AtlasSound.com
Specifications are subject to change without notice.

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  • Page 1 Owner’s Manual AA240 Mixer Amplifier AA240 Atlas Sound Mixer Amplifier 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 – 1 – AtlasSound.com Specifications are subject to change without notice.

  • Page 2: Table Of Contents

    Introduction, Features, and Applications ......................... 6 Front Panel Description ..............................7 Rear Panel Description ..............................8–11 Quick Start Examples ..............................12–14 Wiring the AA240 ................................15 Load Consideration and Overload LED .......................... 15 Measuring Speaker Loads ............................... 16 Measuring 25V/70.7V Distributed Speaker Systems ..................... 16 Security Covers Option ..............................

  • Page 3: Important Safety Instructions

    Owner’s Manual AA240 Mixer Amplifier Important Safety Instructions The lightning flash with arrowhead symbol within an CAUTION equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage “ within the RISK OF ELECTRIC SHOCK fier product’s enclosure that may be of sufficient magnitude...
  • Page 4 AA240 Mixer Amplifier Owner’s Manual CAUTION – When Installing the Product • Plugging in or unplugging the power cord with wet hands may result in electric shock. • Never move the device with the power cord plugged into the wall, as damage to the power cord may result.
  • Page 5 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. Do not to attempt to continue operation with the device as this may cause fire or electric shock: •...

  • Page 6: Introduction, Features, And Applications

    Introduction Congratulations and thank you for purchasing the Atlas Sound Model AA240 professional grade mixer / amplifier. An integral part of the Strategy Series of commercial products, the AA240 was engineered and integrated with unique features to assist the contractor / installer in today’s commercial business audio environment.

  • Page 7: Front Panel Description

    This LED will illuminate blue when the AA240 is turned on. 3. Peak LED The PEAK LED will illuminate Red when the AA240 is in a clipping condition, caused by excessively high input levels or a GAIN con- trol is turned up too high. An occasional flash is OK.

  • Page 8: Rear Panel Description

    1601 Jack McKay Blvd., Ennis, TX 75119 Master (800) 876-3333 AtlasSound.com 10.Dipswitch “A” Positions 1–6 Understanding the functionality of the dipswitches is key to getting the most out of the AA240. Whether the switch is in the “Up” Zone 2 Input 5 Input 4...
  • Page 9 These terminals provide a way to send and receive bal- anced line level signals from the internal mix bus of the AA240. The “BRIDGE IN/OUT” feature is PRE Tone Controls and Low Cut Filter the Bridge In/Out feature allows you to send and receive a balanced signal.
  • Page 10 We suggest you refer to the block diagram of the AA240 to have a complete understanding of the signal flow.
  • Page 11 27. Pwr In The AMP IN connector is useful for converting the AA240 into a slave amp. When a line level signal is connected to this input, the internal connection between the preamp and internal power amp is broken. The AA240 is now just a power amplifier, amplifying audio signals applied to this connector.

  • Page 12: Quick Start Examples

    AA240 Mixer Amplifier Owner’s Manual Quick Start Examples Example 1 — System Paging, BGM, and MOH with Remote Master Level Control This application has the paging microphone into INPUT 1, BGM (CD player) into Input 2, and a Message Repeater or MOH into Input 6.

  • Page 13: Dipswitch Settings

    Example 2 — Hotel Room Combining Using Two AA240s This example utilizes the combining feature of the Atlas AA240 mixer amplifiers. The drawing below shows the equipment connections for two hotel ballrooms, separated by a moveable air wall. The hotel needs to be able to have the audio system operate as one large unit (air wall open) or two discreet systems (air wall closed).
  • Page 14 The diagram below shows a typical small House of Worship audio system. This system utilizes four microphones, one for the pulpit and three on the choir. A Master cap volume control (Atlas Sound AAVC-10K) is connected to the “VCA” terminals for overall level control.

  • Page 15: Wiring The Aa240

    Wiring the AA240 Speaker Outputs - Use 2 conductor unshielded wire of the appropriate gauge. If you are unsure about this, contact Atlas Sound Tech Support at 1-800-876-3333. Make sure you know how many speakers you need and what tap value you intend to use.

  • Page 16: Measuring Speaker Loads

    Measuring Speaker Loads Below is an ipedance load chart for the AA240. When measuring the load impedance prior to connecting the load to the amplifier, the enclosed load chart will provide you the information to determine if the load or speaker system impedance is too low for the amplifier's rating.

  • Page 17: Security Covers Option

    In order to prevent unauthorized operation of the AA240, optional security covers are available which take the place of the front panel knobs. After the AA240 has been installed and is operating as desired, grasp the front panel knobs and pull straight out from the front panel.

  • Page 18: Aa240 Block Diagram

    AA240 Mixer Amplifier Owner’s Manual AA240 Block Diagram Input 6 Input 5 Input 4 Input 3 Input 2 Input 1 Low Cut Input 6 Input 5 Input 4 Input 3 Input 2 Phantom Sens Mute Rcv 100mV T el/Lin e...

  • Page 19: Optional Input Transformer Installation

    Owner’s Manual AA240 Mixer Amplifier Optional Input Transformer Installation Contact Atlas Sound at 1-800-876-3333 for price and availability. INPUT 1 OPTIONAL TRANSFORMER SOCKET XFMER BYPASS XFMER IN XFMER BYPASS XFMER IN INPUT 1 TRANSFORMER JUMPERS (p/n AAIT-600) 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.

  • Page 20: Specifications

    AA240 Mixer Amplifier Owner’s Manual Specifications Power Output Max. Average Power @ 50Hz-20kHz with .5% THD (10-80kHz filter) 4Ω, 1kHz, 240W RMS Transformer Outputs AA240 240W RMS 70.7V AA240 240W RMS 100V AA240 240W RMS Frequency Response 50Hz – 20kHz Distortion <1% at rated power (1kHz)

  • Page 21: Notes

    Owner’s Manual AA240 Mixer Amplifier Notes 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 – 21 – AtlasSound.com Specifications are subject to change without notice.
  • Page 22 AA240 Mixer Amplifier Owner’s Manual Notes 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 AtlasSound.com – 22 – Specifications are subject to change without notice.

  • Page 23: Notes

    Owner’s Manual AA240 Mixer Amplifier Notes 1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A. Telephone: 800.876.3333 • Fax: 800.765.3435 – 23 – AtlasSound.com Specifications are subject to change without notice.

  • Page 24: Warranty

    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Atlas Sound does not assume, or does it authorize any other person to assume or extend on its behalf, any other warranty, obligation, or liability. This warranty gives you specific legal rights and you may have other rights which vary from state to state.

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