Crown PZM-12SP User Manual

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.

Crown PZM-12SP Specifications

General

Brand	Crown
Model	PZM-12SP
Category	Microphone
Language	English

Summary

Discontinued PZM Microphones and Interfaces

PZM Model Overview

Lists and briefly describes discontinued Crown Pressure Zone Microphone models.

PZM Interface Requirements

Details the need for and functions of PZM interfaces for microphone operation.

New PZM Microphone Models

PZM-30GP and PZM-6LP

Introduces the 30GP and 6LP models, including their physical characteristics and applications.

PZM-2LV and PZM-2ORM

Introduces the lavalier (2LV) and flush-mounted (2ORM) microphones and their power supplies.

PZM Model Updates and Applications

PZM 31S Extended Bass Model

Describes the PZM 31S, its extended bass response, and suggested applications.

Piano Miking Application

Presents a user case study detailing PZM microphone use for piano sound reinforcement.

New Crown Clip-On Microphones

PZM-3LVR Redundant Lavalier

Introduces the PZM-3LVR, a redundant clip-on microphone for broadcasting.

PZM-3LV Single Lavalier

Introduces the PZM-3LV, a single-mike clip-on version for voice reinforcement.

PZM Technology Events and Contests

PZM Challenge Contest 1982

Details the 1982 PZM Challenge contest, including categories, entries, and judging.

Additional PZM Microphones

PZM-2.5 Directional PZM

Introduces the PZM-2.5, Crown's first directional PZM for stage pickup.

PZM-12SP

Introduces the PZM-12SP, a lightweight microphone suitable for ceiling or suspended panels.

PZM Interface Schematics

PX-18 and PX-T Schematics

Provides circuit diagrams for the PX-18 and PX-T step-down transformer interfaces.

PZM-2LV Microphone Details

General Specifications

Details technical specifications for the Crown PZM-2LV microphone.

PX-TL Transformer Supply

Describes the PX-TL transformer supply unit for the PZM-2LV microphone.

PZM-20RMG Microphone Details

General Specifications

Details technical specifications for the Crown PZM-20RMG microphone.

Suggested Mounting

Provides recommended mounting instructions and cutout dimensions for the PZM-20RMG.