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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