Crown PZM-6D Manual

PZM-30D
PZM-6D
T
® ®
he Crown PZM -30D is a Pressure Zone
Microphone ® and the PZM-6D is a Pres
sure Zone Microphone. Both are designed
for professional recording, sound reinforcement
and broadcasting. It has many applications, from
miking full orchestras or individual musical in-
struments to security or teleconferencing.
Each mic has a switchable dual frequency re-
sponse: rising (R) or flat (F). The "rising" posi-
tion adds brilliance. This makes it useful
wherever a crisp attack is desired, such as on
percussion, drums, or piano. The user can get a
bright sound without boosting high frequencies
on the recording console; the result is lower
noise. The "flat" position provides a smooth, flat,
high-frequency response for natural sound re-
production.
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 profile, un-
obtrusive appearance is appreciated in confer-
ence rooms, as well as on television, film and
video productions. When suspended over an
orchestra on a clear panel, the PZM-6D practially
disappears. Its miniature, permanently attached
cabel also reduces visual clutter.
The output of either mic is a male 3-pin XLR-
type, balanced and low impedance, which per-
mits long cable runs without hum pickup or
high-frequency loss.
Like other Pressure Zone Microphones, the
PZM-30D and PZM-6D utilize the Pressure Re-
cording Process in which a miniature condenser
microphone capsule is positioned very close to a
sound-reflecting plate or boundary. 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 hemi-
spherical polar pattern, uncolored off-axis re-
sponse, 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.
Crown makes an AC-powered model PH-4B
supply for powering up to four PZMs. Also
available is a single-channel AC/battery supply,
Crown model PH-1A. For special applications,
you can make your own battery supply as sug-
gested in Fig. 4.
POLAR
PATTERN
PRESSURE
ZONE
MICROPHONES
Features
Pressure Zone Microphone design prevents
coloration from surface sound reflections
Choice of flat response or rising high-
frequency response
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
sensitivity –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
produces 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.
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.
Optional accessories: PH-4B phantom power supply
(4 channels, AC powered). PH-1A phantom power
supply (1 channel, battery or AC-adapter powered).
*1 pascal = 10 dynes/cm
PZM-30D
2 = 10 microbars = 94 dB SPL.
PZM-6D
PZM-30D uses a rugged detachable cable.
PZM-6D is smaller, lighter, and has a
permanently attached cable
Hemispherical pickup pattern
Fig. 1
Frequency Response
Frequency in Hz
Legend –––––––––– RISING
- - - - - - - - - FLAT
Low-frequency response depends on size of surface.
Fig. 2
PZM-30D Dimensions