Crown Polar Pattern PZM-10, PZM-10LL Datasheet
PZM®-10
PZM-10LL
POLAR
PATTERN
PRESSURE ZONE
MICROPHONES
he Crown® PZM®-10 and PZM-10LL,
part of the Pressure Zone Microphone
line, are designed for security, surveil-
T
lance, and conference-table use. Since they
do not look like microphones, they are inconspicuous. Each mic’s tubular housing mounts
in a 25/32-inch diameter hole in a ceiling
panel, wall or table.
The PZM-10 has a mic-level output and a
3-pin XLR-type connector for easy plug-in
installation. The mic requires 12 to 48V
phantom power.
The PZM-10LL has a line-level output from
its unterminated cable. It requires 12 to 24V
DC.
Like other Pressure Zone Microphones, the
PZM-10 and PZM-10LL use a miniature mic
capsule mounted very near a sound-refl ecting plate or boundary, in the Pressure Zone.
In this zone, direct sound from the sound
source combines in phase at all frequencies
with refl ected sound off the boundary. The
benefi ts are many: 6 dB more sensitivity,
6 dB less noise, a wide smooth frequency
response free of phase interference, excellent
clarity and “reach,” and consistent pickup
anywhere around the mic.
Frequencies below the voice range are rolled
off to reduce pickup of air conditioning rumble. The high-frequency response is boosted
slightly to help articulation. Because of their
tailored response and PZM construction, the
PZM-10 and PZM-10LL will pick up conversations or other desired sounds with extra
clarity and defi nition.
The output is balanced, low impedance,
which allows long cable runs without hum
pickup or high-frequency loss.
The mic’s humbucking transformer and steel
case prevent hum pickup, even near fl uorescent lights.
Mic Placement
To pick up speech from a small conference
table (about 6 feet square), mount the PZM10 or PZM-10LL in the middle of the table.
For longer tables, use one PZM in the middle
of every 4 to 6 people. No person should be
more than 3 feet from the nearest microphone.
(continued on back)
®
Features:
• Pressure Zone Microphones for security
and surveillance
• Clear, intelligible pickup of speech
• Choice of mic level output (PZM-10) or
line-level output (PZM-10LL)
Specifi cations
Transducer type: Electret condenser.
Frequency response (typical):
PZM-10: 80 Hz to 20,000 Hz. See Fig. 1. PZM10LL: 100 Hz to 20,000 Hz. See Fig. 2.
Polar pattern: Hemispherical.
Impedance:
PZM-10: 240 ohms, balanced.
PZM-10LL: 75 ohms, balanced. Recommended
minimum load impedance 1000 ohms.
Open circuit sensitivity:
PZM-10: 2.5 mV/Pa* (–52 dBV/Pa).
PZM-10LL: 1.4V/Pa* (+3 dBV/Pa).
See Table 1.
Power sensitivity:
PZM-10: –52 dBm/Pa*.
PZM-10LL: +8 dBm/Pa*.
Equivalent noise level (self-noise): 26 dB SPL
typical (0 dB = .0002 dyne/cm2), A-weighted.
S/N Ratio: 68 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL produces 3% THD.
Operating voltage:
PZM-10: 12 to 48V phantom power, positive
voltage on pins 2 and 3 with respect to pin 1.
PZM-10LL: 12 to 24V DC, positive voltage on
red lead with respect to shield.
Polarity:
PZM-10: Positive pressure on the diaphragm
produces a positive voltage on pin 2 with
respect to pin 3 of output connector.
PZM-10LL: Positive pressure on the diaphragm
produces a positive voltage on white lead with
respect to black lead.
Operating Temperature Range: –10° to +60° C
(+14° to +140° F).
• Inconspicous, resembles a light switch
• PZM-10 powered by 12-48V phantom
power
• PZM-10LL powered by 12-24V DC
Current drain:
PZM-10: 400 microamperes.
PZM-10LL: 2.8 mA at 12V DC, 4.22 mA at 24V
DC. See Table 1.
Output connectors:
PZM-10: Male XLR type (3-pin pro audio). PZM10LL: None.
Cable:
PZM-10: None supplied. Use 2-conductor
shielded mic cable.
PZM-10LL: 12-in., permanently attached 3-conductor shielded cable. Red: B+, White: audio+,
Black: audio–, Shield: ground.
Materials: Steel plate and housing.
Finish: Off-white. May be painted any color; take
care to fi rst seal the opening between the
capsule and boundary plate.
Net weight: PZM-10: 2.6 oz. (73.6 g).
PZM-10LL: 3.3 oz. (93.9 g).
Dimensions: See Fig. 3.
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
Table 1
Effect of power-supply voltage on
PZM-10LL sensitivity and current drain
B+ SENSITIVITY DRAIN
24V 1.4 V/Pa 4.22 mA
20V 1.4 V/Pa 3.00 mA
15V 1.0 V/Pa 2.75 mA
12V 0.9 V/Pa 2.50 mA
Fig. 1
PZM-10 Frequency Response
®
PZM-10
Frequency in Hz
Fig. 2
PZM-10LL Frequency Response
Frequency in Hz
Mic Placement (continued)
For other placement suggestions, see the
Crown Microphone Application Guide for Security and Surveillance at www.crownaudio.
com/mic_htm/mic_pubs.htm.
Mic Installation
1. Please refer to Fig. 3 and identify the parts
shown.
2. Determine where you want to install the
microphone, and drill a 25/32-inch diameter
hole there.
3. PZM-10 only: Obtain some 2-conductor
shielded mic cable, long enough to run from
your equipment input to the microphone. If
space is tight behind the mounting surface,
obtain a right-angle female XLR connector.
Solder the female XLR connector onto the
cable: shield to pin 1, hot lead to pin 2, other
lead to pin 3.
PZM-10LL only: Obtain enough mic cable
to run from your equipment input to the microphone. You can use either a 2-conductor
shielded mic cable with a separate DC power
lead, or a 3-conductor shielded mic cable
(with one of the leads used for power).
4. Run the female XLR (if used) and mic cable
to the hole.
5. Using a 5/32-in. Allen wrench, remove the
collar from the microphone. Insert the microphone tube into the hole.
6. Slide the collar onto the mic tube. Pull
the plate tight against the hole and press the
collar tight against the mounting surface.
Tighten the Allen screw in the collar.
7. PZM-10 only: Plug your mic cable into the
microphone.
PZM-10LL only: Solder the PZM-10LL cable
leads to your mic cable as described below:
Red to 12-24V DC
White to Audio + lead
Black to Audio – lead
Shield to cable shield and power supply –.
8. PZM-10 only: Plug the other end of your
mic cable into one of these devices:
* A mic preamp that supplies phantom
power.
* A mixer that supplies phantom power.
* A phantom power supply, such as the
Crown PH-1A.
Connect the output of the supply to the mic
input of your mic preamp, mixer or recorder.
Architects’ and Engineers’ Specifi cations
PZM-10
The microphone shall be the Crown PZM-10
or equivalent. The microphone shall be a
electret condenser Pressure Zone Microphone with a hemispherical polar pattern.
The microphone shall have a tubular housing
which mounts in a 25/32-in. diameter hole.
Open-circuit sensitivity shall be 2.5 mV/Pa
typical. Equivalent noise level shall be 26
dBA typical. Maximum SPL shall be 120
dB for 3% THD. Powering shall be 12-48 V
phantom power. Output connector shall be
male XLR-type. The Crown PZM-10 microphone is specifi ed.
Architects’ and Engineers’ Specifi cations
PZM-10LL
The microphone shall be the Crown PZM10LL or equivalent. The microphone shall be
a electret condenser Pressure Zone Microphone with a hemispherical polar pattern.
The microphone shall have a tubular housing
which mounts in a 25/32-in. diameter hole.
Open-circuit sensitivity shall be 1.4V/Pa typical. Equivalent noise level shall be 26 dBA
typical. Maximum SPL shall be 120 dB for
3% THD. Powering shall be 12-24 V DC. The
microphone shall have a 12-in. unterminated
cable. The Crown PZM-10LL microphone 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.
PZM-10
PZM-10LL
Service
If the unit fails to work, fi rst replace or repair
the mic cables and check the power supply. 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. If service is required, return the microphone in its original packaging to: Crown
Factory Service, 1718 West Mishawaka
Road, Elkhart, Indiana 46517-9439. For
further assistance or technical support call
800-342-6939.
Fig. 3 Dimensions
*
*2.450 in. (6.2 cm) in PZM-10LL
Crown International, Inc.
1718 W. Mishawaka Rd.
©
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.
Pressure Recording Process is a trademark of E.M.
Long Associates.
5/08 136932-4
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
2008 Crown Audio®, Inc. Specifi cations subject
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