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The Mark of the Professional...
USER'S MANUAL
D-250AL 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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O L D R E L I A B I L I T Y
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Related Manuals for J. W. Davis & Company D-250AL
Summary of Contents for J. W. Davis & Company D-250AL
- Page 1 The Mark of the Professional... USER’S MANUAL D-250AL POWER AMPLIFIER Product Description ....Using Horn Speakers ....
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Page 2: Specifications
RMS power into a direct coupled 8-ohm voice coil load or into a constant voltage 25V or 70.7V line. Only 2 racks in height, the D-250AL uses a toroidal power transformer to reduce weight, height, and noise. The D-250AL, designed for commercial sound or “all-in-one” telephone... - Page 3 4-8 ohm/25V/70.7 Inputs Patch Feature For Additional Amplifier D-250AL 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 Relay. A relay has been added to the D-250AL circuitry to surpasses the safe operating range. Pushing the plunger will prevent any DC from reaching the output. A slight delay of the reset the breaker.
- Page 5 THE LOW-CUT FILTER The D-250AL is equipped with a low cut filter that is activated by the LINE OUTPUT switch. When the switch is in the IN position the 25 and 70.7 volt ouputs will roll-off any frequencies below 120Hz. Low frequencies can damage horn diaphrams, as well as compression drivers, if no filter is used.
- Page 6 J. W. Davis & Company has been subjected to abuse or accident, improper installation or alteration in any way. If the D-250AL fails to operate during this period, return it prepaid to J.
- Page 8 The Mark of the Professional... XI. TROUBLESHOOTING SYMPTON POSSIBLE CAUSE POSSIBLE SOLUTIONS No AC power present • Verify the unit is receiving AC power. • Verify the AC outlet has proper AC voltage available. Power Indicator on Unit’s AC circuit breaker is •...
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