Crown PZM-6D Placement, Architects’ and Engineers’ Specifications, Warranty, Service

mixer input, or if your mixer has phantom power built in, simply plug the PZM direct into a mixer mic input.

Fig. 3

		1:1 XFMR
1	2	CT	2	1	TO MIXER
TO MIC
	3			3	MIC INPUT
		+
		18V (TWO 9-V ALKALINE)
			100mF 25V
			+
1	2	1K	2	1	TO MIXER
TO MIC					MIC INPUT
	3	1K	100mF 25V	3
			+

+

18V (TWO 9-V ALKALINE)

MATCH RESISTORS WITHIN 1% (10 OHMS)

If your mixer or recorder requires an unbalanced phone plug connector, modify the cable exiting the power supply as follows: solder the cable shield and the pin-3 lead to the phone-plug ground terminal. Solder the pin-2 lead to the phone plug “hot” or “tip” terminal.

Placement

PZMs are designed to operate on any stiff, non- absorbent boundary (or surface). Typical bound- aries are a floor, wall, ceiling or table. This type of mounting maintains the flattest low-frequency response.

The published response curve is measured on an “infinite” boundary such as a floor, ceiling or wall. The microphone’s low-frequency response depends on the size of the boundary on which it

is placed. Specifically, the response begins to shelve down at and below the frequency F, where F = 750/D, and D = the boundary dimen- sion in feet. At approximately F = 188/D, the output of the microphone is down 6 dB, be- comes omnidirectional, and maintains a flat response down to approximately 30 Hz.

Several placement examples are described in the Crown Boundary Mic Application Guide, available free from your dealer or directly from the Crown Literature Department.

Architects’ and Engineers’ Specifications

The microphone shall be the Crown PZM-6D or equivalent. The microphone shall have a hemispherical pattern when used on an infinite boundary. The element shall be a sub- miniature electret type of rugged construc- tion. A smooth frequency response from 20 Hz to 20 kHz shall be obtained. The response shall be switch-selectable between flat (F) or rising (R).

The microphone shall employ the patented PRP principle for maintaining phase coher- ency, thus eliminating comb filtering in the audible spectrum.

Permanently attached to the microphone is a fifteen-foot black cable with an XLRM con- nector.

The PZM-6D shall have a sensitivity of –43 dBV/Pa. The microphone shall accept 150 dB SPL input while contributing no greater than 3% THD (open circuit termination). Equiva- lent noise shall be typically 20 dBA re .0002 dyne/cm2. The Crown PZM-6D is specified.

PZM®-6D

Warranty

Crown professional microphones are guaran- teed unconditionally against malfunction from any cause for a period of three years from date of original purchase. Please refer to the en- closed full warranty sheet for more detail.

Service

If the microphone does not function properly, check that it is placed correctly and is con- nected as described in the Operating Instruc- tions. Also check mic cables and your power supply. If the microphone is defective, return the microphone in its original packaging to:

Crown Service Department, Plant 2SW, 1718 W. Mishawaka Road, Elkhart, IN 46517. For further assistance or technical support call 800- 342-6939.

PZM-6D Schematic

Crown International, Inc.

P. O. Box 1000

Elkhart, IN 46515-1000

TEL: 219-294-8000

FAX: 219-294-8FAX

©2000 Crown International, Inc.

Crown®, PZM® and Pressure Zone Microphone® are registered trademarks of Crown International, Inc. Pressure Recording Process is a trademark of E. M. Long Assocates.Specifications subject to change without prior notice.

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