Crown CM31 Supercardioid Condenser Choir Microphone

CROWN CM31 Details

The CM Series of condenser microphones by Crown offer exceptional quality at truly affordable prices. With application-specific microphones, ranging from professional-grade headworn microphones to critical-response microphones for the most demanding recording applications, the CM Series can fit most any microphone need. Types include hand-held, headworn, hanging, or stand-mounted.

With innovations such as Crowns patented Differoid technology, the CM series combines years of technical know-how with durable, high-quality materials and workmanship. These qualities are direct contributors to the successful performances of our customers, and a primary reason for the success Crown enjoys today.

Used by world-renowned artists such as Garth Brooks, Britney Spears and Janet Jackson, the Crown CM-311A Differoid microphone is the headworn microphone of choice for the live-performance industry. Featuring clear, crisp vocal performance in a lightweight package, this microphone signifies the quality and performance value of the Crown CM Series of microphones.

Crown CM-31 Microphone
The Crown CM-31 is a professionalquality, supercardioid condenser microphone designed for inconspicuous miking of a choir, orchestra or stage. It can also hang over conference tables or discussion groups for inconspicuous isolated miking.

The CM-31 consists of two parts: the microphone with a permanently attached 30-foot (9.15-m) cable and the cylindrical electronics power module.

The mic cable connects to the power module, which adapts the microphone for phantom powering and includes a low-cut switch. Cable connection is via miniature 3-pin connectors. The power module output is balanced, low impedance. It is protected against static and radio-frequency interference.

The CM-31 has a smooth, wide-range frequency response for natural reproduction of the singing voice, organ or other musical instruments. Extreme low frequencies are filtered out to reduce pickup of room rumble.

The microphone has a built-in removable hanger which allows easy position adjustment. The CM-31 microphone and cable are black; the CM-31W microphone and cable are white.

 

CROWN CM31 Specs

Type: Unidirectional condenser.
Transducer: Electret condenser.
Frequency Response (typical): 40 Hz to 20,000 Hz
Polar Pattern: Supercardioid
Impedance: 150 ohms, balanced. Recommended minimum load impedance 1000 ohms.
Open Circuit Sensitivity: 10 mV/Pa* (–40 dB re 1 volt/ Pa).
Power Sensitivity: –37.5 dB re 1 mW/Pa.
Equivalent Noise Level: 28 dB SPL typical (0 dB = .0002 dyne/cm2), A-weighted.
S/N Ratio: 66 dB at 94 dB SPL.
Maximum Sound Pressure Level: 120 dB SPL produces 3% THD.
Mic-Cable Connector: TA3F (mini XLR-type).
Power Module Connector (input): TB3M (mini XLRtype).
Power Module Connector (output): 3-pin male XLRtype.
Power Module Switch: Flat/low-cut.
Operating Voltage: Phantom power, 12 to 48 volts DC, positive voltage on pins 2 and 3 with respect to pin 1 of output connector.
Materials: Brass housing, steel power module housing.
Finish: Black (CM-31) or white (CM-31W).
Weight (microphone and cable): 4 ounces (113 grams).
Weight (microphone, cable and power module): 9.5 ounces (269 grams).
Cable: Black (CM-31) or white (CM-31W), 30' (9.15- m) 2-conductor shielded 0.1" (.254-cm) diameter cable from microphone to electronics; none supplied for electronics output. Use 2-conductor shielded microphone cable.
Dimensions:
Included Accessories: WS5 black foam windscreen for CM-31, WS5W white foam windscreen for CM- 31W.
Optional Accessories: Crown PH-1A phantom power supply (1 channel, battery or AC adaptor powered), Crown PH-4B phantom power supply (4 channels,
AC powered).

CROWN CM31 Documentation

CM31 Manual (pdf)

 

Other views of CROWN CM31 (Click to enlarge):

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