Filter
Top Products
Crown International, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8000
FAX: 574-294-8FAX
www.crownaudio.com
CM-31
CM-31W
©
2005 Crown Audio
®
, Inc.
Specifi cations subject to change without prior notice.
Crown and Crown Audio are registered trademarks of
Crown International, Inc.
11/05 125114-4
Architects’ and Engineers’ Specifi cations
The microphone shall be the Crown CM-31.
It shall be a professional-quality supercar-
dioid condenser microphone designed for
inconspicuous miking of a choir or other large
musical ensembles. It can be hung from the
ceiling, where its cable shall connect to a cylin-
drical electronics power module that adapts the
microphone for phantom powering.
Frequency response shall be 40 Hz to 20,000
Hz. Extreme low frequencies shall be fi ltered out
to reduce pickup of room rumble. The power
module shall have fl at/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 shall be balanced, low impedance, with
RFI and static protection.
A built-in removable hanger shall allow posi-
tion adjustment. The mic-cable connector shall
be a TA3F. The power module input connector
shall be a TB3M and the power module out-
put connector shall be a 3-pin male 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 con-
nector. Finish shall be black (CM-31) or white
(CM-31W). The cable from mic to electronics
shall be 30-foot (9.15-m) 2-conductor shielded.
The Crown CM-31 is specifi ed.
Warranty
Crown professional microphones are guaran-
teed 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,
replace or repair mic cables and connectors,
check the power supply.
If you determine the microphone product(s)
is defective, return the complete product
mic and interface) in its original package to:
Crown Factory Service, 1718 W. Mishawaka
Road, Elkhart, IN 46517-9439.
A Service
Return Authorization (SRA) is required for
product being sent to the factory for ser-
vice. An SRA can be completed on line at
www.crownaudio.com/support/factserv.htm.
For further assistance or technical support call
800-342-6939.
The mic and electronics are a matched pair.
Do not separate them. For service send them
both in.
Fig. 4b
Fig. 4a
Fig. 5
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