TOA PM-660U Specifications

TOA COMMERCIAL SOUND

DESK MOUNT PAGING MICROPHONE

PM-660U

DESCRIPTION

TOA’s PM-660U is an elegantly styled, compact desk

microphone for use in public address, paging and radio

communication systems. Ideal applications include

restaurants, offices, warehouses, transportation terminals,

dispatch centers and entertainment facilities.

Its smooth, natural response provides high quality voice reproduction and excellent articulation to enhance the overall performance of your system. Compact and lightweight, the PM-660U requires a minimum of desk or counter space and is easy to handle.

To significantly reduce background noise and feedback, the PM-660U features a cardioid pick-up pattern that is uniform over the entire frequency range. The dynamic microphone element has a 600 ohm balanced output and the microphone is supplied with an attached

8.2’, four-conductor cable with stripped wire ends. Two conductors are shielded and are dedicated for the microphone signal. The other two unshielded conductors con-

nect to an auxiliary, normally-open switch contact, used to activate external muting, priority or relay control circuits. The auxiliary switch contact is closed by using the push-to-talk bar, which also turns on the microphone by opening a second set of contacts that normally short the mic element. A locking lever is provided to keep the push-to-talk bar in the “on” position when the microphone must be kept open for an extended period.

A wire mesh grille protects the mic element and incorporates an internal wind screen to reduce popping noises from speech. Ideal for desktop or shelf mounting, the integral microphone stand/base is fitted with four, rubber isolated feet to reduce mechanical noise pick-up. Constructed of high impact ABS resin, the microphone is finished in a neutral dark gray with a prominent, orange push-to-talk button.

FEATURES

1. Sleek, modern design fits today’s high tech workstations.

2. Dynamic microphone element with a 600 ohm balanced output.

3. Prominent press-to-talk bar with convenient locking lever.

4. Auxiliary switch contact for mute or relay circuits.

5. Cardioid pattern with excellent ambient noise rejection.

6. Delivers a smooth and natural sound.

7. Four conductor attached cable.

SPECIFICATIONS

PERFORMANCE

Directivity

Sensitivity (1 kHz) Frequency Response Microphone Element Impedance

CONTROLS

Push-To-Talk Bar:

Microphone Normally closed Auxiliary Switch Contact Normally open

Locking Lever

PHYSICAL

Cable Length Cable Type Finish:

Microphone Head

Stand / Base

Dimensions W” x H” x D”)

Weight (Ibs)

* 0 dB = 1 V / Pascal Specifications are subject to change without notice.

Unidirectional, cardioid pattern

-58 dB* 100Hz-10kHz Dynamic (moving coil) 600 ohm, balanced

(mic element shorted)

(dry contact) Locks push-to-talk bar

in “on” position

Attached 8.2’ with stripped, tinned wire ends

2-C shielded (audio) 2-C (aux switch)

Zinc plated steel mesh, gray baked paint

Gray ABS resin

3.9 x 8.5 x 5.9

0.97

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS

The device shall be a low impedance, dynamic microphone with an integral stand and base suitable for desk and shelf mounting. Nominal sensitivity and impedance shall be -58 dB at 1 kHz (ref: 0 dB = 1 V / Pascal), 600 ohms, balanced. Frequency response shall be from 100 Hz to 10 kHz with a cardioid directivity pattern that is uniform over the entire frequency response range.

A push-to-talk bar shall be mounted in the base with a locking lever to permit locking the bar in the microphone on position. The bar shall actuate two long-leaf, spring-type switch contacts. One shall be a normally closed contact that shorts the microphone element in the microphone off position. A second dry contact shall be provided for use with external muting, priority or relay circuits. The second contact shall be normally open with the microphone off. An attached 8.2’ cable shall be pro-

vided with two shielded conductors for the microphone audio and two unshielded conductors for the auxiliary switch contact. The cable shall be supplied with stripped and solder-tinned wire ends.

The microphone stand/base shall be constructed of

dark gray, ABS resin plastic with a zinc-plated steel mesh head for the microphone element. The head shall have a baked gray paint finish and an internal wind screen. The

TALK

push-to-talk bar shall be orange with

engraved on its face. Dimensions shall be 3.9” x 8.5” x 5.9”. Weight shall be 0.97 Ibs.

The microphone shall be the TOA PM-660U.

WIRING DIAGRAM

WHT RED SHIELD

BLU BLK

601 Gateway Boulevard, Suite 300

South San Francisco, California 94080

Phone: (415) 588-2538 Fax: (415) 588-3349

Printed

U.S.A.

TOAElectronics,

Inc.