Crown CM-31 Quick Start Manual

condenser microphone designed for inconspicu-
ous miking of a choir or other large musical
ensembles. It can be hung from the ceiling,
where its cable shall connect to a cylindrical
electronics power module that adapts the micro-
phone for phantom powering.
Frequency response shall be 40 Hz to 20,000 Hz.
Extreme low frequencies shall be filtered out to
reduce pickup of room rumble. The power mod-
ule shall have flat/low-cut switch. Open-circuit
sensitivity shall be 10 mV/Pa. Equivalent noise
level shall be 28 dBA SPL typical; SPL for 3%
THD shall be 120 dB. The microphone output
Fig. 4a
Fig. 4b
shall be balanced, low impedance, with RFI and
static protection.
A built-in removable hanger shall allow position
adjustment. The mic-cable connector shall be a
TB3F. The power module input connector shall be
a TB3M and the power module output connector
shall be a 3-pin pro audio XLR-type. Operating
voltage shall be standard phantom power, 12 to
48 volts DC, positive voltage on pins 2 and 3 with
respect to pin 1 of output connector. Finish shall
be black (CM-31) or white (CM-31W). The cable
from mic to electronics shall be 30' 2-conductor
shielded. The Crown CM-31 is specified.
Fig. 5
CM-31/CM-31W Schematic
CM-31
CM-31W
Warranty
Crown professional microphones are guaranteed
unconditionally against malfunction from any
cause for a period of three years from date of
original purchase. See enclosed warranty sheet
for additional information.
Service
If the microphone does not function properly,
verify that it is placed correctly and is connected
as described in the Operating Instructions. Also
check mic cables and your power supply. If
service is required, return the microphone in it's
original packaging to the Crown Service Depart-
ment, Plant 2 SW, 1718 W. Mishawaka Road,
Elkhart, IN 46517. For further assistance or
technical support call 800-342-6939.
Fig. 6
Use the clamp and screw provided to mount the
CM-31/CM-31W power module onto the ceiling,
a wooden beam, or beneath a lectern/table.
Fig. 7
Crown International, Inc.
P . O. Box 1000
Elkhart, IN 46515-1000
TEL: 219-294-8000
FAX: 219-294-8FAX
© 1997 Crown International, Inc.
Specifications subject to change without prior notice.
®
Crown is a registered trademark of Crown Interna-
tional, Inc.
10/97
®
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