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DISCONTINUED PZMS
11-30-05
This document has information on discontinued Crown Pressure Zone
Microphones, taken from the Crown Mic Memo newsletter. All these PZMs
(except the PZM-20RM and PZM-20RMG) have an XLR output in which one pin
is ground, another pin is B+, and another pin is high-impedance unbalanced
audio out. In order to operate, these PZMs required a PZM interface (described
later).
The models described are:
PZM-30GP 5"x 6" boundary mic with emphasized high frequencies
PZM-6LP
2" x3" boundary mic with emphasized high frequencies
PZM-2LV
lavalier mic
PZM-20RM flush-mounted mic with built-in interface, black finish
PZM-20RMG flush-mounted mic with built-in interface, gold finish
PZM-31S
5" x 6" boundary mic with flat frequency response
PZM-3LV
lavalier mic
PZM-3LVR redundant lavalier mic
PZM-2.5
directional PZM with the capsule mounted in a plexiglass corner
PZM-12SP
early version of the Sound Grabber
The specifications given for the PZM-2LV and PZM-20RMG apply to the other
PZMs.
This document also covers the PZM interfaces. Each PZM interface had these
functions:
• Convert the high-impedance unbalanced PZM output to low-impedance
balanced.
• Convert phantom power to +/- 18VDC for powering the PZM, or supply
+/- 18VDC from two 9V batteries.
PA-18 active interface with battery/phantom powering
PX-18 passive transformer interface with battery/phantom powering
PX-T passive transformer interface in a tube
PX-TL passive transformer interface in a tube, with a mini XLR connector for
PZM-2LV, PZM-3LV, and PZM-3LVR microphones.
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Related Manuals for Crown PZM-12SP
Summary of Contents for Crown PZM-12SP
- Page 1 11-30-05 This document has information on discontinued Crown Pressure Zone Microphones, taken from the Crown Mic Memo newsletter. All these PZMs (except the PZM-20RM and PZM-20RMG) have an XLR output in which one pin is ground, another pin is B+, and another pin is high-impedance unbalanced audio out.
- Page 2 Fig. 1. Crown PZM-30GP Crown Model 6LP [now the PZM-6D] is a smaller PZM with a 2 x 3 inch plate and an XLR connector at the end of a cable. The 6LP is suitable for all applications but is most useful where minimum size may be required for aesthetic or practical reasons.
- Page 3 Fig. 2. Don Eger (left), Crown PZM Project Manager, and Ken Wahrenbrock check out the PZM test facility prior to the tour by the representatives. PZM EXTENDED BASS MODEL ADDED Crown has added the PZM 31S [now the PZM-30D] to its line, offering a somewhat ditterent frequency response curve to users.
- Page 4 Two new PZM mikes have been added to the Crown line, both clip-on versions. The 3LVR [now replaced by the CM-10], a redundant mike, has been designed by Crown to be used particularly in broadcasting situations. The 3LVR includes two separate PZM microphones mounted on a clip-on bar, 5.0cm long by 1.0cm wide.
- Page 5 The beginning On February 1,1982. Crown mailed to all names on the PZMemo mailing list, to all PZM dealers, and to editors of professional audio magazines a notice of the PZM Challenge, which was actually two contests. The “Open” Contest could be entered by anyone except Crown employees and their fami- lies.
- Page 6 PZM-12SP [now the PZM-30D] PZM-12SP The PZM-12SP has a bright, crisp sound like the PZM-30GP, but is designed for somewhat different applications. Since it weighs very little, the 12SP can be safely attached to ceilings or suspended panels. And it includes a handle for easy stand mounting - say, over drums.
- Page 7 PX-18 SCHEMATIC STEP-DOWN TRANSFORMER APPROX. 3:1 4.7 uF PIN 3 ORANGE AUDIO TO PZM PIN 2 RED PIN 1 GREY GROUND MATCH 30.1K RESISTORS WITHIN 1 % PX-T SCHEMATIC 4.7 uF PIN 3 ORANGE AUDIO TO PZM PIN 2 RED PIN 1 GREY GROUND MATCH 30.1K RESISTORS WITHIN 1 %...