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Crown PZM-30D Datasheet

Pressure zone microphone
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®
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 reinforce-
ment and broadcasting. It has many applica-
tions, from miking full orchestras or individual
musical instruments to security or teleconfer-
encing.
Each mic has a switchable dual frequency
response: rising (R) or fl at (F). The "rising"
position 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 fre-
quencies on the recording console; the result
is lower noise. The "fl at" position provides a
smooth, fl at, high-frequency response for natu-
ral sound reproduction.
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 pro-
fi le, unobtrusive appearance is appreciated in
conference rooms, as well as on television,
fi lm and video productions. When suspended
over an orchestra on a clear panel, the PZM-6D
practically disappears. Its miniature, perma-
nently attached 15-foot cable also reduces
visual clutter. Model PZM-6DS2 has a 6-foot
cable, and can be special-ordered from your
Crown dealer.
The output of either mic is a male 3-pin XLR-
type, balanced and low impedance, which
permits long cable runs without hum pickup or
high-frequency loss.
Like other Pressure Zone Microphones, the
PZM-30D and PZM-6D utilize the Pressure
Recording Process in which a miniature con-
denser microphone capsule is positioned very
close to a sound-refl ecting plate or bound-
ary. 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 refl ected off
the boundary. The benefi ts are excellent clarity
and "reach," a hemispherical polar pattern, un-
colored off-axis response, 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.
Available from Crown is a single-channel AC/
battery phantom-power supply, model PH-1A.
For special applications, you can make your
own battery supply as suggested in Fig. 4.
POLAR
PATTERN
PRESSURE
ZONE
MICROPHONES
Features
Pressure Zone Microphone design prevents
coloration from surface sound refl ections
Choice of fl at response or rising high-
frequency response
Specifi cations
Type: Pressure Zone Microphone.
Transducer: Electret condenser.
Frequency response: 20 Hz to 20 kHz. See Fig. 1.
Polar pattern: Hemispherical when used on a fl oor,
wall or ceiling.
Open circuit sensitivity: 7 mV/Pa* (–43 dB re 1
volt/Pa).
Power sensitivity: –43 dB re 1 mW/Pa. EIA sensitiv-
ity –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 pro-
duces 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. Model
PZM-6DS2 has a 6-foot (1.83-m) cable, and can
be special-ordered from your Crown dealer.
Switch: Frequency-response select switch for rising
or fl at 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-1A phantom power supply
(1 channel, battery or AC-adapter powered).
*1 pascal = 10 dynes/cm
PZM-30D
Fig. 1
Fig. 2
2
= 10 microbars = 94 dB SPL.
PZM-6D
PZM-30D uses a rugged detachable cable.
PZM-6D is smaller, lighter, and has a per-
manently attached cable
Hemispherical pickup pattern
Frequency Response
Frequency in Hz
Legend –––––––––– RISING
- - - - - - - - - FLAT
Low-frequency response depends on size of surface.
PZM-30D Dimensions

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Summary of Contents for Crown PZM-30D

  • Page 1 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).
  • Page 2 fi ltering in the audible spectrum. The PZM-30D 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). Equivalent noise shall be typically 20 dBA re .0002 dyne/...

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Pzm-6d