Crown Audio PZM-6D, PZM-30D User Manual
PZM®-30D
PZM-6D
POLAR
PATTERN
PRESSURE
ZONE
MICROPHONES
PZM-30D
PZM-6D
he Crown® PZM®-30D is a Pressure Zone
Microphone
sure Zone Microphone. Both are designed
T
for professional recording, sound reinforcement and broadcasting. It has many applications, from miking full orchestras or individual
musical instruments to security or teleconferencing.
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 frequencies on the recording console; the result
is lower noise. The “fl at” position provides a
smooth, fl at, high-frequency response for natural 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 profi 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, permanently 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 XLRtype, 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 condenser microphone capsule is positioned very
close to a sound-refl ecting 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 refl ected off
the boundary. The benefi ts are excellent clarity
and "reach," a hemispherical polar pattern, uncolored off-axis response, and a wide smooth
frequency response free of phase interference.
Operating Instructions
The PZM-30D and PZM-6D feature self-contained 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.
®
and the PZM-6D is a Pres-
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).
PZM-30D uses a rugged detachable cable.
PZM-6D is smaller, lighter, and has a permanently attached cable
Hemispherical pickup pattern
Fig. 1
- - - - - - - - - FLAT
Low-frequency response depends on size of surface.
Fig. 2
Frequency Response
Frequency in Hz
Legend –––––––––– RISING
PZM-30D Dimensions
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
PZM-30D
PZM-6D
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
phantom 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 phoneplug 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
boundaries are a fl oor, wall, ceiling, or table.
This type of mounting improves the low-
frequency response.
The published response curve is measured on
an “infi nite” boundary such as a fl oor, ceiling or
wall. The microphone’s low-frequency response
depends on the size of the boundary on which
it is placed. Specifi cally, 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
omnidirectional, and maintains a fl at response
down to approximately 30 Hz.
Several placement examples are described in
the Crown Boundary Mic Application Guide. For
specifi c microphone application guides please
refer to our website at http://www.crownaudio.
com/mic_web/mic-library.htm.
Fig. 3
PZM-6D Dimensions
Architects’ and Engineers’ Specifi cations
PZM-30D
The microphone shall be the Crown PZM-30D
or equivalent. The microphone shall have a
hemispherical pattern (when used on an infi nite
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 fl at (F) or rising (R).
The microphone shall employ the patented PRP
principle for maintaining phase coherency,
thus eliminating comb 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/
2
cm
. The microphone color shall be black. The
microphone connector shall be a male 3-pin
XLR-type. The Crown PZM-30D is specifi ed.
PZM-6D
The microphone shall be the Crown PZM-6D
or equivalent. The microphone shall have a
hemispherical pattern (when used on an infi nite
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 fl at (F) or rising (R).
Fig. 4 Phantom Power Supplies
The microphone shall employ the patented
PRP principle for maintaining phase coherency,
thus eliminating comb fi ltering in the audible
spectrum.
Permanently attached to the microphone is a
fi fteen-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/
2
cm
. The microphone color shall be black. The
microphone connector shall be a male 3-pin
XLR-type. The Crown PZM-6D is specifi ed.
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-
9439. A Service Return Authorization (SRA) is
required for product being sent to the factory
for service. An SRA can be completed on line
at www.crownaudio.com/support/factserv.
htm.
For further assistance or technical support call
800-342-6939.
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Crown International, Inc.
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©2006 Crown Audio®, Inc. Specifi cations subject to change
without prior notice. Latest information available at
www.crownaudio.com. Crown, Crown Audio, PZM and Pressure Zone Microphone are registered trademarks of Crown
International.
2/06 137203-3
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
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