Specifications

INSTALLED SOUND
67
PZM-11LLWR
Water-Resistant Security/Surveillance Mic
Similar to the PZM-11LL, the PZM-11LLWR is a weather-
resistant model designed for outdoor use. 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 and home automa-
tion. Requires 12-24V AC or DC. Phantom powering by spe-
cial order.
Element Type: Electret Condenser
Frequency Response: 80 Hz to 10 kHz
Polar Pattern: Hemispherical
Impedance: 75 ohms
Sensitivity: 1.4 V/Pa
PCC-160
Half-Supercardioid Ceiling Microphone
The PCC-160 is ideal for use underneath over-
hangs, or on the ceiling near a wall.
Half-supercardioid polar pattern rejects room
acoustics for a clearer sound. White version
(PCC-160W) also available. Phantom powered.
Element Type: Electret Condenser
Frequency Response: 50 Hz to 18 kHz
Polar Pattern: Half-Supercardioid
Impedance: 150 ohms
Sensitivity: 22 mV/Pa
CM-30
Hanging Microphone for Security/Surveillance
Nearly invisible and with a built-in (removable) hanger for
easy positioning, the CM-30 is an ideal hanging microphone.
Its ultratight supercardioid pattern rejects unwanted noise and
reverb. Electronics for the CM-30 attach straight to a rectan-
gular electrical box. Accepts phantom power and includes
30-ft. (9.14 m) cable and electronics. Available in two ver-
sions: black (CM-30) or white (CM-31W).
Element Type: Electret Condenser
Frequency Response: 40 Hz to 20 kHz
Polar Pattern: Supercardioid
Impedance: 150 ohms
Sensitivity: 10 mV/Pa
Why Choose Crown Mics for Security/Surveillance?
• They don’t look like microphones.
• They provide exceptional clarity of speech.
• They reduce rumble from air conditioning and truck
MIC TIPS
Placement of Ceiling Mics
One way to cover a large room is with
PZMs on the ceiling.
How far apart should the mics be to get
uniform coverage? Use the 2-to-1 rule. The
spacing between mics should be two times
the distance from mouth to ceiling. For
example, if the ceiling is 5 feet above the
talkers' mouths, the mics should be 10 feet
apart. Then the mics will pick up everyone
about equally.
In general, use the smallest number of mics
that will do the job.
If several mics are on at the same time, the
recorded sound might be reverberant or
muddy. It helps to run all the mics into a
gated mixer (automatic mixer), which turns
on only one mic at a time - the one nearest
the person speaking. This keeps the sound
clear.
If the ceiling is very high, mount the PZM-
11 or PZM-11LL on support posts and/or
walls, about 10 feet off the floor (out of
reach).
Half-supercardioid mics like the PCC-160
should be placed on the ceiling a few feet
from the wall, looking into the room.
For more details, see the Crown
Microphone Application Guide for Security
and Surveillance at www.crownaudio.com.
Under Expert Advice, Mics, click on Tech
Info.