®
Crown International, Inc.
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 219-294-8000
FAX: 219-294-8FAX
Internet: http://www.crownaudio.com
CM-310ASW
©
1998 Crown International, Inc.
Specifications subject to change without prior notice.
Crown
®
is a registered trademark of Crown Interna-
tional, Inc.
9/98
100389-1
Fig. 4
Fig. 5
CM-310ASW Schematic
Fig. 6
Fig. 7
7.335"
2.020"
.840"
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
+
ANNOUNCING
MUSIC
DIP SWITCH
+
+
G
2
3
1
P1
OUTPUT
ELECTRONICS IN HANDLE
CAPSULE ELECTRONICS
+
W5
TO
CAPSULE
HOT
TO
CAPSULE
GND
+
W9
+
C5
R5
R8
RED
BLU
R10
W7
W6
C7
R11
S2
W8
R12
C8
R9
GRN
BLK
W5
C4
R7
R6
Q1
Q2
C6
W4
T1
R4
R3
S1C
Q1
S
W1
W2
W3
W6
W4
B+
W1
W2
W3
D
R6
GND
R1
C1
AUDIO
C1
R1
R2
S1A
C2
S1B
C3
R2
C2
R4
R5
R3
battery supply or AC-adapter supply, Crown
model PH-1A. For special applications, you
can make your own battery supply as sug-
gested in Fig. 5.
Since the microphone cancels sounds that
are not close to the mic, you must talk
close to the microphone with lips touching
the grille-screen; talk directly into the
front of the microphone (as in Fig. 6).
To reduce wind noise or breath popping,
place the included foam windscreen on the
microphone. Note: This will reduce the
mic’s noise-canceling ability.
The switch inside the mic is factory-set to
“announcing.” To change the switch to
“music,” you need to pull out the circuit
board in the mic.
1. Remove the screw in the mic handle near
the connector.
2. Using needlenose pliers, pull on the
connector pins to pull out the circuit board.
Be careful not to break the wires soldered to
the board.
3. Set the DIP switch as shown in Fig. 7 and
reassemble the mic.
Architects’ and Engineers’ Specifications
The microphone shall be the Crown model
CM-310ASW Differoid or equivalent. The
microphone shall be a hand-held differen-
tial-type condenser requiring 12 to 48 volts
phantom powering. Included shall be a
magnetic reed switch to turn the micro-
phone on and off. The microphone shall a
have 2-position dip switch for setting the
frequency response for announcing or
music.
A smooth frequency response from 80 Hz to
15 kHz shall be obtained, with a uniform off-
axis response. The polar pattern shall be
cardioid. The microphone shall have an
open-circuit sensitivity of 1.7 mV/Pa*. The
microphone shall accept a 151 dB SPL input
while providing no greater than 3% THD
(open-circuit termination). Equivalent noise
shall be 21.5 dBA typical (0 dB = .0002
dyne/cm
2
). The Crown model CM-310ASW
microphone is specified.
Warranty
Crown professional microphones are guar-
anteed unconditionally against malfunction
from any cause 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, first replace or
repair the mic cables and check the power
supply. If service is required, return the
microphone in its original packaging to
Crown’s Service Department at Plant 2SW,
1718 W. Mishawaka Road, Elkhart, IN
46517. For further assistance or technical
support call 800-342-6939.
