Crown PZM-6D User manual

POLAR
PATTERN
Specifications
PZM-30D
PZM-6D
PRESSURE
ZONE
MICROPHONES
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).
Fig. 2
Low-frequency response depends on size of surface.
The 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. *1 pascal = 10 dynes/cm2= 10 microbars = 94 dB SPL.
PZM-30D PZM-6D
Fig. 1
Frequency in Hz
Legend –––––––––– RISING
- - - - - - - - - FLAT
Frequency Response
Features
Pressure Zone Microphone design prevents
coloration from surface sound reflections
Choice of flat response or rising high-
frequency response
PZM-30D uses a rugged detachable cable.
PZM-6D is smaller, lighter, and has a
permanently attached cable
Hemispherical pickup pattern
PZM-30D Dimensions

Crown International, Inc.
P. O. Box 1000
Elkhart, IN 46515-1000
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
©2003 Crown Audio, Inc. Specifications subject to change
without prior notice. Latest information available at
www.crownaudio.com. Crown, PZM and Pressure Zone
Microphone are registered trademarks of Crown Interna-
tional.
5/03 125575-5
PZM-30
PZM-6D
Architects’and Engineers’Specifications
PZM-30D
The microphone shall be the Crown PZM-30D
or equivalent. The microphone shall have a
hemispherical pattern (when used on an infinite
boundary). The element shall be a subminiature
electret type of rugged construction. A smooth
frequency response from 20 Hz to 20 kHz shall
be obtained. The response shall be switch-
selectable between flat (F) or rising (R).
The microphone shall employ the patented PRP
principle for maintaining phase coherency, thus
eliminating comb filtering in the audible spec-
trum.
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/cm2. The
microphone color shall be black. The micro-
phone connector shall be a male 3-pin XLR-
type. The Crown PZM-30D is specified.
PZM-6D
The microphone shall be the Crown PZM-6D or
equivalent. The microphone shall have a hemi-
spherical pattern (when used on an infinite
boundary). The element shall be a subminiature
electret type of rugged construction. A smooth
frequency response from 20 Hz to 20 kHz shall
be obtained. The response shall be switch-
selectable between flat (F) or rising (R).
+
+
+
+
The microphone shall employ the patented PRP
principle for maintaining phase coherency, thus
eliminating comb filtering in the audible spec-
trum.
Permanently attached to the microphone is a
fifteen-foot black cable with an XLRM connector.
The PZM-6D 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/cm2. The mi-
crophone color shall be black. The microphone
connector shall be a male 3-pin XLR-type. The
Crown PZM-6D is specified.
Warranty
Crown professional microphones are guaranteed
against malfunction for a period of three years
from date of original purchase. Please refer to
the enclosed full warranty statement for more
detail.
Service
If the microphone does not function properly,
replace or repair mic cables and check the
power supply.
If you determine the microphone product(s) is
defective, return the complete product in its
original packaging to: Crown Factory Service,
1718 W. Mishawaka Road, Elkhart, IN 46517.
For further assistance or technical support call
800-342-6939.
Using two-conductor shielded microphone
cable, plug the microphone into a phantom
power supply. Connect the power supply output
to a mixer mic input, or if your mixer has phan-
tom power built in, simply plug the PZM directly
into a mixer mic input.
If your mixer or recorder requires an unbalanced
phone plug connector, modify the cable leaving
the power supply as follows: Solder the cable
shield and the pin-3 lead to the phone-plug
ground terminal. Solder the pin-2 lead to the
phone plug “hot” or “tip” terminal.
Placement
PZMs are designed to operate on any stiff non-
absorbent boundary (or surface). Typical bound-
aries are a floor, wall, ceiling, or table. This type
of mounting improves the low-frequency re-
sponse.
The published response curve is measured on
an “infinite” boundary such as a floor, ceiling or
wall. The microphone’s low-frequency response
depends on the size of the boundary on which it
is placed. Specifically, the response begins to
shelve down at and below the frequency F,
where F= 750/D and D= the boundary dimension
in feet. At approximately F=188/D, the output of
the microphone is down 6 dB, becomes omnidi-
rectional, and maintains a flat response down to
approximately 30 Hz.
Several placement examples are described in the
Crown
Boundary Mic Application Guide . For
specific microphone application guides please
refer to our website at http://
www.crownaudio.com/mic_htm/mic_pubs.htm.
®
Fig. 4
Fig. 3
3"
2.5"
.375"
2.5"
PZM-6D Dimensions
12/03 137203-1