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J. W. Davis & Company D-500A User Manual

2-channel 500 watt power amplifier
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The Mark of the Professional...
USER'S MANUAL
D-500A POWER AMPLIFIER
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N E W   T E C H N O L O G Y
J.W. Davis & Company
Sales 800-527-5705 • Fax 800-388-9106 • Corp 214-651-7341 • Fax 214-939-0328 • sales@jwd.com • www.jwd.com
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• 3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219
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090705124

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Summary of Contents for J. W. Davis & Company D-500A

  • Page 1: Table Of Contents

    The Mark of the Professional... USER’S MANUAL D-500A POWER AMPLIFIER Product Description ....Using Horn Speakers ....

  • Page 2: Product Description

    RMS power into a direct coupled 8-ohm voice coil load or into a constant voltage 25V or 70.7V line. Only 3 racks in height, the D-500A uses a toroidal power transformer to reduce weight, height, and noise. The D-500A, designed for commercial sound or “all-in-one” telephone paging...

  • Page 3: Unpacking Procedures

    4-8 ohm/25V/70.7 Inputs Patch Feature For Additional Amplifier D-500A POWER AMPLIFIER III. INSTALLATION INFORMATION RACK MOUNTING For best results use a 10-32 class UNF-2B or 12-24 class UNC-2B rack and 0.625 inch machine screws (metric: M5X8-6H or M6X1-6H, 15.88mm). It is recommended that the drive of these screws be phillips to protect the finish from unnecessary scratches.

  • Page 4: The Front Panel

    The Mark of the Professional... IV. THE FRONT PANEL 3 - OVERLOAD INDICATOR This red LED will light/flash 1 - VOLUME CONTROL Adjusts the master volume level of at full power and on peaks. A steady bright glow could output for the amplifier. indicate a shorted speaker line, too much load, or oscillation 2 - CIRCUIT BREAKER Pushing this plunger resets the...

  • Page 5: Speaker Installation

    The Mark of the Professional... VI. SPEAKER INSTALLATION The D-500A is designed to be connected to 4 ohm or 8 ohm speakers directly, or to variable impedance speakers that match the amplifier’s line output voltage of 25V or 70.7V speaker lines.

  • Page 6: The Auto-Mute Circuit

    J. W. Davis & Company has been subjected to abuse or accident, improper installation or alteration in any way. If the D-500A fails to operate during this period, return prepaid to J. W. Davis & Company Warranty Service with a letter explaining the problem and proof of purchase.

  • Page 7: Troubleshooting

    The Mark of the Professional... XI. TROUBLESHOOTING SYMPTON POSSIBLE CAUSE POSSIBLE SOLUTIONS(S) No AC power present • Verify the unit is receiving AC power. Power Indicator on • Verify the AC outlet has proper AC voltage available Front Panel Does Not Glow: Unit’s AC circuit breaker is •...

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