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Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
Specifi cations subject to change without prior notice. Latest
information available online at www.crownaudio.com.
Crown and Crown Audio are registered trademarks of
Crown International.
©
2008 by Crown Audio
®
, Inc.
7/08 136453-4
GLM-100
GLM-200
Fig. 4. GLM-200 Polar Response
0
°
30
°
60
°
90
°
120
°
150
°
180
°
210
°
240
°
270
°
300
°
330
°
-
0 dB
-
5
-
10
-
15
-
20
FRONT
REAR
1000 Hz
300 Hz
3000 Hz
Fig. 6. Battery Phantom Supplies
2
3
1
1
2
3
18V (TWO 9-V ALKALINE)
MATCH RESISTORS WITHIN 1% (10 OHMS)
TO MIC
TO MIXER
MIC INPUT
1:1 XFMR
100mF 25V
1K
CT
TO MIXER
MIC INPUT
TO MIC
18V (TWO 9-V ALKALINE)
1K 100mF 25V
+
2
1
3
1
2
3
+
+
+
Fig. 5. Dimensions
.310 in.
7.9 mm
.505 in.
12.8 mm
.185 in. dia.
MAX
4.7 mm
.680 in.
17.3 mm
.755 in.
19.2 mm
Operating Instructions
The GLM-100 and GLM-200 require 12 to 48V
phantom power to operate. Crown makes a model
PH-1A single-channel phantom supply powered
by battery or AC adapter. The adapter should
provide 24V DC from a 1/8-inch (3.5mm) phone
plug with positive tip. For special applications you
can make your own battery supply as suggested
in Figure 6.
Using a microphone cable, plug the GLM-100 or
GLM-200 into a phantom power supply. Connect
the power-supply output to a mixer mic input, or
if your mixer has phantom power built in, plug the
GLM directly into a mixer mic input.
For outdoor or vocal use, place the included GLM-
WS2 Windscreen on the microphone to reduce
wind noise and breath popping.
The front of the microphone is indicated by the
word “FRONT” on the microphone housing.
Although the cable is rugged, excessive abuse
such as tugging and twisting will shorten its life.
It should last indefi nitely if treated with care. The
cable has been kept short to allow easy wrapping
and to reduce the amount of thin cable on stage.
As with all electret condenser microphones, the
GLM should be kept out of hot environments
(greater than 130 degrees F or 54.5 degrees C).
Following this suggestion will ensure years of reli-
able performance from the mic capsule.
Suggestions for Use
Detailed GLM application notes are in the Crown
Microphone Application Guide available free from
your dealer, directly from Crown, or online at
www.crownaudio.com.
Architects' and Engineers' Specifi cations
GLM-100
The microphone shall be the Crown GLM-100.The
microphone shall be an omnidirectional electret
condenser type requiring 12 to 48 volts phantom
powering. A smooth frequency response from 20
Hz to 20,000 Hz shall be obtained, with a uniform
off-axis response.The microphone shall have an
open-circuit sensitivity of 3.2 mV/Pa. A perma-
nently attached, 8 foot (2.5m), two-conductor,
shielded cable with 3-pin pro audio connector shall
be supplied with the microphone. The microphone
shall accept a 150 dB SPL input while providing no
greater than 3% THD (open circuit termination).
Equivalent noise shall be 28 dBA typical (0 dB =
.0002 dyne/cm
2
). SPL for 3% THD shall be 150
dB. The Crown GLM-100 microphone is specifi ed.
GLM-200
The microphone shall be the Crown GLM-200.
The microphone shall be a hypercardioid electret
condenser type requiring 12 to 48 volts phantom
power. A smooth frequency response from 60 Hz
to 20,000 Hz shall be obtained, with a uniform
off-axis response. The microphone shall have an
open-circuit sensitivity of 6 mV/Pa. A permanently
attached, 8 foot (2.5m), two-conductor, shielded
cable with XLR-type connector shall be supplied
with the microphone. The microphone shall accept
a 131 dB SPL input while providing no greater
than 3% THD (open circuit termination). Equiva-
lent noise shall be 31 dBA typical (0 dB = .0002
dyne/cm
2
). The Crown GLM-200 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.
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. If
service is required, return the microphone in its
original packaging to: Crown Factory Service,
1718 West Mishawaka Road, Elkhart, Indiana
46517-9439. 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. For further assistance or technical support
call 800-342-6939.