Crown PZM-11LLWR User manual

POLAR
PATTERN
PRESSURE
ZONE
MICROPHONE
The Crown®PZM®-11LLWR is a weather-
resistant Pressure Zone Microphone®
with a balanced, line-level output. A plastic
membrane inside the microphone protects the
mic capsule from water damage. The mic mounts
in a standard electrical outlet box. Applications
include fast-food restaurants, outdoor intercoms,
toll booths, bridges, theme park security, home
automation, and so on.
The microphone can be plugged directly into a
VCR line input — no costly mic preamp is needed.
Output (via screw terminals) can be balanced or
unbalanced. Powering is by 12-24V AC or DC. The
unit can be factory-set for phantom powering by
special order, as a PZM-11LLWRS1.
In the PZM-11LLWR, frequencies below the voice
range are rolled off to reduce traffic rumble. The
high-frequency response is boosted to help ar-
ticulation. Because of its tailored response and
PZM construction, the PZM-11LLWR will pick up
conversations or other desired sounds with extra
clarity.
The unit is “weather resistant,” which means:
• The microphone will work during and after
rainfall.
• The mic’s frequency response will change tempo-
rarily if the membrane gets wet, but will return to
normal when dry.
• If water freezes on the membrane, the mic’s
frequency response will change, but will return
to normal when the ice melts and the membrane
dries.
• High-pressure water sprays directly on the
membrane (through the louvered wall plate) may
damage the membrane.
• The microphone is not designed to be sub-
merged.
Installation
1. Please refer to Figure 3 and locate all the parts
shown. The electrical outlet box and cables are not
included.
2. Run a 2-conductor shielded cable to the surface
where you intend to install the microphone. In-
stall a standard electrical outlet box there (2-inch
minimum depth).
3. The PZM-11LLWR can be powered by 12-24V
AC or DC.
From your power source, run a twisted pair power
cable to the mic location. Run the power cable
through the hole in the electrical box. Service the
end of the power cable.
PZM®-11LLWR
Specifications
Transducer type: Electret condenser.
Frequency response (typical): 80 Hz to 10,000 Hz
(see Fig. 1).
Polar pattern: Hemispherical.
Impedance: 75 ohms, balanced. Recommended
minimum load impedance 1000 ohms.
Open-circuit sensitivity, typical: 1.4 V/Pa.
Power sensitivity, typical: +8 dBm/Pa.
Equivalent noise level (self-noise): 26 dB SPL typi-
cal (0 dB = .0002 dyne/cm2), A-weighted.
S/N Ratio: 68 dB at 94 dB SPL.
Maximum SPL: 100 dB SPL produces 3% THD at
maximum gain.
Operating voltage: 12-24V AC or DC. Phantom pow-
ering by special order as a PZM-11LLWRS1.
Polarity: Positive pressure on diaphragm produces
positive voltage on audio+ terminal with respect to
audio– terminal
Current drain: 4 milliamperes.
Operating temperature range: –10° to + 60° C, or
+14° to +140° F. The mic still works at –40° C but
its sensitivity is reduced. When the mic is returned
to normal operating temperature, its sensitivity will
be within +/–3 dB of normal.
Output connector: Screw terminals labeled AUDIO +,
AUDIO – and GROUND.
Cable: None supplied. Use 2-conductor shielded mic
cable and twisted-pair power cable.
Materials: Steel plate and high-impact plastic capsule
holder. Plastic membrane, part no. 127255-1.
Finish: Silver. If you paint the mic, take care not to
paint inside the louvered wall plate.
Net weight: 2.5 oz. (71 g).
Dimensions: 4.530 x 2.780 x 1.722 inches (LWD)
(see Fig. 2).
*1 pascal = 10 dynes/cm2= 10 microbars = 94 dB SPL.
Fig. 1
Frequency in Hz
Frequency Response
Fig. 2
•Ideal for outdoor security, surveillance and
intercoms
• Weather-resistant
• Line-level output connects directly to video
recorders
• Clear, articulate sound
• Inconspicuous
Features
Dimensions

Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
©2008 Crown Audio®, Inc. Specifications 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.
1/08 126839-5
4. Run the mic cable through the hole in the elec-
trical box. Service the end of the mic cable.
5. Connect the mic cable’s audio hot lead to the
terminal labeled AUDIO +. Connect the audio cold
lead to the terminal labeled AUDIO –. Connect the
cable shield to the terminal labeled GROUND.
If you plan to use an RCA or phone connector: Sol-
der the cable shield to the long lug, and solder the
AUDIO + lead to the tip or pin. Do not connect the
AUDIO – lead because this may reduce the output
level in an unbalanced configuration.
6. Attach the power leads to the screw terminals
marked “~”. You can use 12-24V AC or DC. Polar-
ity does not matter in either case.
7. Using the two shorter screws provided, attach
the mic to the electrical box. Then use the other
two screws to secure the louvered wall plate to the
microphone. Do not remove or damage the plastic
membrane.
8. If the mic cable is run in metal conduit, ground
loops can occur that can cause hum. If hum is
present after installation, return the unit to Crown’s
service dept. for ground-lift modification.
Architects’ and Engineers’ Specifications
The microphone shall be the Crown model
PZM-11LLWR or equivalent. It shall be a Pressure
Zone Microphone, mountable in a wall or ceiling,
and designed not to look like a microphone. It shall
have a line-level output (1.4 V/Pa unloaded) and be
powered by 12-24V AC or DC, or phantom power.
The frequency response shall be from 80 Hz to
10,000 Hz with a low-frequency rolloff to reduce
rumble and high-frequency boost for articulation.
The audio connector and power connector shall
be screw terminals. Output shall be balanced, low
impedance. The electret condenser transducer
shall have a hemispherical polar pattern when the
microphone is mounted in a wall or ceiling. The
Crown PZM-11LLWR microphone 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.
Fig. 3
Service
If the unit fails to work, recheck all your connec-
tions as described in the Installation Section.
Check the cables. Also check the power supply to
verify that it is supplying correct voltage. 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 assis-
tance or technical support call 800-342-6939.
PZM-11LLWR