@crown
®
Microphone Quick Reference
[
Guaranteed Excellence
Crown International, Inc.
Trademark Notice:
Crown,
®
Pressure Zone Microphone,
®
and PZM
®
are registered trademarks of Crown International
Inc.
–20
–25
–30
–35
20 100 1K
+15
+10
+5
dB 0
–5
–10
–15
10K
Fig. 5 Frequency Response
Frequency in Hz
D2
D4
D3
D1
C1
C5
C6 C7 C9
C4
Q1
C2
C8
+
+
+ +
+
GND
R5
GAIN
U2
OUTPUT
R21
GND LIFT
INPUT
– AUDIO
+ AUDIO
12 TO 24V DC
1
2
3
+
+
Fig. 4 PZM-11LL Power Supply Hookup
PZM-11LL: If you plan to use an RCA or
phone connector: Solder the cable shield
to the long lug, and solder the audio hot
lead to the tip or pin. Do not connect the
audio return lead because this may re-
duce the output level in an unbalanced
configuration.
PZM-11: Connect the output of the phan-
tom supply to your equipment mic in-
put. Or, if your mic input has phantom
power built in, simply connect the mic
cable to the mic input.
If the mic cable is run in metal conduit,
ground loops might occur that can cause
hum. If hum is present after installation,
remove the ground-lift jumper (chip re-
sistor R21 labeled GND LIFT) on the
printed-circuit board.
Warranty
Crown professional microphones are
guaranteed unconditionally against mal-
function from any cause for a period of
three years from date of original pur-
chase. If such malfunction occurs, micro-
phone will be repaired or replaced (at
our option) without charge for materials
or labor.
If the unit fails to work check the mic
cables, phantom power supply, place-
ment, and connections. If the micro-
phone seems to be defective, return the
microphone in its original packaging to
Crown’s Service Department at 57620
CR 105, Elkhart, IN 46517. For further
assistance or technical support call 800-
342-6939.
Specifications
Type:
Electret condenser.
Frequency response (typical):
80 Hz to
20 kHz. See Fig. 5.
Polar pattern:
Hemispherical.
Impedance PZM-11:
225 ohms, bal-
anced.
Impedance PZM-11LL:
75 ohms, bal-
anced.
Recommended minimum load imped-
ance:
1000 ohms.
Open-circuit sensitivity PZM-11:
5 mV/
Pa* (–46 dB re 1 V/Pa*).
Open-circuit sensitivity PZM-11LL:
1.4
V/Pa* (+3 dB re 1 V/Pa*).
Power sensitivity PZM-11:
–45.5 dB re 1
mW/Pa*.
Power sensitivity PZM-11LL:
+8 dBm/
Pa*.
Equivalent noise level:
26 dB SPL typical
PZM-11 and PZM-11LL Security Mic
(0 dB=.0002 dyne/cm
2
), A-weighted.
S/N ratio:
68 dB minimum at 94 dB SPL.
Maximum SPL at 3% THD PZM-11:
120
dB SPL.
Maximum SPL at 3% THD PZM-11LL:
100 dB SPL.
Operating voltage PZM-11:
12 to 48 VDC
phantom power with positive voltage on
terminals 2 and 3 with respect to termi-
nal 1.
Operating voltage PZM-11LL:
24 VAC,
12-24 VDC, or phantom power (see PZM-
11 specification).
Current Drain PZM-11:
400 µA.
Current Drain PZM-11LL:
4 mA.
Output Connector:
Screw terminal.
Materials:
Steel plate and high impact
plastic capsule holder, off-white.
Dimensions:
See Fig. 1.
Weight:
2.5 oz (71 g).
Cable:
None supplied.
*1 pascal = 10 microbars = 10 dynes/cm
2
= 94 dB SPL.
