J.W. Davis DM-1A User Manual

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Cardioid polar pattern with noise cancellation

esigned for clear and precise speech

Push-to-talk switch

Lock-on switch for hands-free operation

NEW TECHNOLOGY

OLD RELIABILITY

J.W. Davis & Company

3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219

Sales 800-527-5705 • Sales Fax 800-388-9106 • Corp 214-651-7341 • Corp Fax 214-939-0328 • www.jwd.com • jwd@jwd.com

The Mark of the professional...

DESKTOP PAGING MICROPHONE

J. W. Davis DM-1A

FEATURES

DESCRIPTION

The DM-1A is specifically engineered for

paging, dispatching and radio applications.

The balanced, dynamic microphone element

provides a unidirectional, cardioid pattern with

noise cancellation that permits clear voice

reproduction in noisy environments and affords

maximum gain before feedback. Low imped-

ance allows a longer cable run from the micro-

phone to the amplifier without encountering

interference. Push-to-talk and hands-free,

lock-on switches provide operational adaptabil-

ity. A flexible 9.8'

four-conductor, shielded

cable is attached.

•

Dynamic microphone element

Priority paging

Low impedance

Compact die cast base

090301141

Page 1
Cardioid polar pattern with noise cancellation d esigned for clear and precise speech push-to-talk switch lock-on switch for hands-free operation new technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • sales fax 800-388...
Page 2
The diagram below shows the wiring schematic for the dm-1a. If using a male “xlr” type connector, the gnd(shield) should be connected to pin 1, the red(mic+) connected to pin 2 and the black(mic-) connected to pin 3. When using an amplifier that has vox muting (such as a davis ampli- fier), the yell...