POLAR
PATTERN
PRESSURE ZONE
MICROPHONE
PZM®-185
he Crown® PZM®-185 Pressure Zone
Microphone® is a microphone designed for
general-purpose use. Ideal for applications
T
such as conferences, group discussions, inter-
views,broadcast,homevideoproduction,lectures,
and recordings. The mic can be placed on a large
surface such as a table, floor, wall, or lectern.
Features
Low-impedance XLR-type output
Boundary “paddle” can be detached
Clear, bright sound quality with excellent
bass
Ideal for table-top or on-floor
recordings: conference, group discus-
sions, interviews, broadcast, home video,
lectures, music
The PZM-185 is powered either by an internal
AAA 1.5V battery or 12-48V phantom power. The
boundary “paddle” can be detached so the mic
will fit in your pocket. Attached to the mic is an
8-foot (2.438-m) cable leading to a tubular power
module.
Works on internal AAA battery or phantom
power
Themicrophone’slow-profiledesignreduces“mic
fright” and minimizes clutter. It is nearly invisible
on camera. The PZM-185 minimizes pickup of
vibration and handling noise.
Specifications
Element: Electret condenser.
Frequency response (typical): 50 Hz to 16 kHz (Fig. 1).
Polar pattern: Hemispherical (half-omni) on a large
surface.
Impedance: 150 ohms, balanced. Recommended mini-
mum load impedance 1000 ohms.
Open circuit sensitivity (1.5V battery power):
0.8mV/Pa (–62 dB re 1 volt/Pa*).
Power sensitivity (1.5V battery power): –59.5 dBm.
EIA sensitivity –154 dBm.
Open-circuit sensitivity (phantom power):
3.2 mV/Pa* (–50 dB re 1V/Pa).
Power sensitivity (phantom power): –47.5 dBm.
EIA sensitivity –142 dBm.
Optional accessories: Crown PH-1A phantom power
supply (1 channel, battery or AC adapter powered).
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
Its electret condenser capsule provides a wide,
smooth frequency response from 50 Hz to 16 kHz.
The mic’s hemispherical polar pattern allows clear
pickup of everyone surrounding the microphone.
The PZM-185 is protected against static and RFI.
The output is balanced, low impedance, which
allows long cable runs without hum pickup or
high-frequency loss.
Fig. 1
Frequency Response
+15
+10
+5
Like other Pressure Zone Microphones, the PZM-
185usesaminiaturemiccapsulemountedverynear
asound-reflectingplateorboundaryinthePressure
Zone. In this zone, direct sound from the sound
source combines in phase at all frequencies with
reflected sound off the boundary. The benefits are
many: 6dBmoresensitivity,6dBlessnoise,awide
smooth frequency response free of phase interfer-
ence, excellent clarity and “reach,” and consistent
pickup anywhere around the microphone.
dB
0
–5
Equivalent noise level (self-noise): 21 dB SPLtypical,
–10
–15
–20
–25
–30
–35
A-weighted (0 dB = .0002 dyne/cm2).
S/N ratio: 73 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL produces 3% distortion
with phantom power.
Polarity: Positive pressure on the diaphragm produces
positive voltage on pin 2 with respect to pin 3 of the
output connector.
10K 20K
20
100
1K
Frequency in Hz
Cable: 8-foot (2.438-m), 2-conductor shielded, perma-
nently attached cable. No other cable supplied; use
2-conductor shielded mic cable.
Operating Instructions
Fig. 2
Dimensions
You can power the PZM-185 either by 12-48V
phantom power or battery power. To use phantom
power, plug the mic connector into a phantom
power supply or into a mic input that provides
12-48V phantom power.
Output connector: 3-pin XLR-type pro audio connector.
3.409 in.
(8.7 cm)
Operating voltage: One 1.5V size AAA alkaline battery
(Duracell MN2400 or equivalent) or 12 to 48V phantom
power (positive voltage on pins 2 and 3 with respect to
pin 1).
Battery life: Approximately 45 days.
Current drain: 0.5 mA.
Materials: High-impact plastic housing and steel power
module.
Finish: Satin black.
Dimensions: Fig. 2.
3.129 in.
(7.9 cm)
To use battery power, open the cover (Fig. 3) and
insert a AAA 1.5V battery. Please note the correct
orientation of the battery.
5.90 in.
(15.0 cm)
If you’re using the microphone on a hard surface,
such as a table top, the boundary “paddle” is not
necessary. If you’re using the mic on a carpet or
other sound-absorbing surface, attach the bound-
ary “paddle” for best results.
Weight: 4 ounces (115 grams).
Included accessories: 1.5V AAA battery.
.607 in.
(1.5 cm)
.732 in.
(1.86 cm)
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