POLAR
PATTERN®

PZM -30D
PZM-6D
he Crown® PZM®-30D is a Pressure ZoneMicrophone® and the PZM-6D is a Pressure Zone Microphone. Both are designed
for professional recording, sound reinforcement and broadcasting. It has many applications, from miking full orchestras or individual
musical instruments to security or teleconferencing.

PRESSUREZONEMICROPHONES
PZM-30D

PZM-6D

T

Each mic has a switchable dual frequency
response: rising (R) or flat (F). The “rising”
position adds brilliance. This makes it useful
wherever a crisp attack is desired, such as onpercussion, drums, or piano. The user canget a bright sound without boosting high frequencies on the recording console; the result
is lower noise. The “flat” position provides asmooth, flat, 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 profile, unobtrusive appearance is appreciated inconference rooms, as well as on television,
film 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-footcable, and can be special-ordered from yourCrown 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, thePZM-30D and PZM-6D utilize the Pressure
Recording Process in which a miniature condenser microphone capsule is positioned veryclose to a sound-reflecting plate or boundary. The capsule is mounted in the “PressureZone” just above the boundary, a region wheresound coming directly from the sound source
combines in phase with sound reflected off
the boundary. The benefits are excellent clarityand "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 plugdirectly 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 yourown battery supply as suggested in Fig. 4.

FeaturesPressure Zone Microphone design prevents
coloration from surface sound reflections
Choice of flat response or rising highfrequency response

PZM-30D uses a rugged detachable cable.
PZM-6D is smaller, lighter, and has a permanently attached cable
Hemispherical pickup pattern

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 1volt/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 themicrophone 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. Model
PZM-6DS2 has a 6-foot (1.83-m) cable, and canbe special-ordered from your Crown dealer.
Switch: Frequency-response select switch for risingor 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-1A phantom power supply(1 channel, battery or AC-adapter powered).
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.

Fig. 1Frequency ResponseFrequency in Hz

Legend –––––––––– RISING- - - - - - - - - FLAT
Low-frequency response depends on size of surface.

Fig. 2

PZM-30D Dimensions

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 cableleaving the power supply as follows: Solder thecable shield and the pin-3 lead to the phoneplug ground terminal. Solder the pin-2 lead tothe phone plug “hot” or “tip” terminal.
Placement
PZMs are designed to operate on any stiff
non-absorbent boundary (or surface). Typicalboundaries are a floor, wall, ceiling, or table.
This type of mounting improves the lowfrequency response.
The published response curve is measured onan “infinite” boundary such as a floor, ceiling orwall. 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, becomesomnidirectional, 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 pleaserefer to our website at http://www.crownaudio.
com/mic_web/mic-library.htm.
Fig. 3

PZM-6D Dimensions

Architects’ and Engineers’ Specifications
PZM-30D
The microphone shall be the Crown PZM-30Dor equivalent. The microphone shall have ahemispherical pattern (when used on an infiniteboundary). The element shall be a subminiatureelectret type of rugged construction. A smooth
frequency response from 20 Hz to 20 kHz shallbe obtained. The response shall be switchselectable 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
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). Equivalentnoise shall be typically 20 dBA re .0002 dyne/
cm2. The microphone color shall be black. The
microphone connector shall be a male 3-pin
XLR-type. The Crown PZM-30D is specified.

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). Equivalentnoise shall be typically 20 dBA re .0002 dyne/
cm2. The microphone color shall be black. Themicrophone 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. Pleaserefer to the enclosed full warranty statement for
more detail.
ServicePZM-6D
The microphone shall be the Crown PZM-6Dor equivalent. The microphone shall have ahemispherical pattern (when used on an infiniteboundary). The element shall be a subminiatureelectret type of rugged construction. A smooth
frequency response from 20 Hz to 20 kHz shallbe obtained. The response shall be switchselectable between flat (F) or rising (R).

Fig. 4The microphone shall employ the patented
PRP principle for maintaining phase coherency,
thus eliminating comb filtering in the audible
spectrum.

Phantom Power Supplies

If the microphone does not function properly,
replace or repair mic cables and check thepower 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 465179439. A Service Return Authorization (SRA) isrequired for product being sent to the factoryfor 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.

+

Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com+++©2006 Crown Audio®, Inc. Specifications subject to change
without prior notice. Latest information available atwww.crownaudio.com. Crown, Crown Audio, PZM and Pressure Zone Microphone are registered trademarks of Crown
International.

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