Crown Audio PZM-30D specifications PZM-6D, Features, Operating Instructions, Specifications

POLAR

PATTERN

®

PZM -30D

PZM-6D

he Crown® PZM®-30D is a Pressure Zone TMicrophone® and the PZM-6D is a Pres- sure Zone Microphone. Both are designed

for professional recording, sound reinforce- ment and broadcasting. It has many applica- tions, from miking full orchestras or individual musical instruments to security or teleconfer- encing.

Each mic has a switchable dual frequency response: rising (R) or flat (F). The “rising” position adds brilliance. This makes it useful wherever a crisp attack is desired, such as on percussion, drums, or piano. The user can

PRESSURE

ZONE

MICROPHONES

PZM-30D PZM-6D

Features
Pressure Zone Microphone design prevents	PZM-30D uses a rugged detachable cable.
coloration from surface sound reflections	PZM-6D is smaller, lighter, and has a per-
Choice of flat response or rising high-	manently attached cable
	Hemispherical pickup pattern
frequency response

get a bright sound without boosting high fre- quencies on the recording console; the result is lower noise. The “flat” position provides a smooth, flat, high-frequency response for natu- ral sound reproduction.

The PZM-30D is sturdy and reliable because it can be used with a rugged detachable cable. The PZM-6D has a smaller plate. Its low pro- file, unobtrusive appearance is appreciated in conference rooms, as well as on television, film and video productions. When suspended over an orchestra on a clear panel, the PZM-6D practically disappears. Its miniature, perma- nently attached 15-foot cable also reduces visual clutter. Model PZM-6DS2 has a 6-foot cable, and can be special-ordered from your Crown dealer.

The output of either mic is a male 3-pin XLR- type, balanced and low impedance, which permits long cable runs without hum pickup or high-frequency loss.

Like other Pressure Zone Microphones, the PZM-30D and PZM-6D utilize the Pressure Recording Process in which a miniature con- denser microphone capsule is positioned very close to a sound-reflecting plate or bound- ary. The capsule is mounted in the “Pressure Zone” just above the boundary, a region where sound coming directly from the sound source combines in phase with sound reflected off the boundary. The benefits are excellent clarity and "reach," a hemispherical polar pattern, un- colored off-axis response, and a wide smooth frequency response free of phase interference.

Operating Instructions

The PZM-30D and PZM-6D feature self-con- tained electronics which allows them to plug directly into a standard 12-48 VDC phantom power supply.

Available from Crown is a single-channel AC/ battery phantom-power supply, model PH-1A.

Specifications

Type: Pressure Zone Microphone.

Transducer: Electret condenser.

Frequency response: 20 Hz to 20 kHz. See Fig. 1.

Polar pattern: Hemispherical when used on a floor, wall or ceiling.

Open circuit sensitivity: 7 mV/Pa* (–43 dB re 1

volt/Pa).

Power sensitivity: –43 dB re 1 mW/Pa. EIA sensitiv- ity –135 dBm.

Impedance: 240 ohms, balanced. Recommended minimum load impedance 1000 ohms.

Self-noise:20 dB equivalent sound pressure level, A-weighted.

S/N ratio: 74 dB at 94 dB SPL.

Maximum Sound Pressure Level: 150 dB SPL at the microphone produces 3% THD.

Polarity: Positive pressure on the diaphragm pro- duces positive voltage on pin 2 with respect to pin 3 of the output connector.

Operating voltage: Phantom power, 12 to 48 volts DC, positive voltage on pins 2 and 3 with respect to pin 1 of the output connector.

Current drain: 1.1 mA.

Connector: Male 3-pin XLR-type.

Cable:

PZM-30D: None supplied; use 2-conductor shielded microphone cable.

PZM-6D: Permanently attached 15-foot (4.58-m) black cable with XLRM connector. Model PZM-6DS2 has a 6-foot (1.83-m) cable, and can be special-ordered from your Crown dealer.

Switch: Frequency-response select switch for rising or flat response.

Color: Black.

Weight: 6.5 ounces (184 grams).

Dimensions:

PZM-30D: 6 in. x 5 in. x .75 in. (15.2 cm x 12.7 cm x 1.9 cm). See Fig. 2.

PZM-6D: 3 in x 2.5 in. x .375 in. (7.62 cm x 6.35 cm x .95 cm). See Fig. 3.

Included accessories: PZM windscreen, carrying pouch.

Fig. 1 Frequency Response

Frequency in Hz

Legend –––––––––– RISING

- - - - - - - - - FLAT

Low-frequency response depends on size of surface.

Fig. 2

PZM-30D Dimensions

For special applications, you can make your own battery supply as suggested in Fig. 4.

Optional accessories: PH-1A phantom power supply (1 channel, battery or AC-adapter powered).

*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.