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AKG CM311A
Headworn Differoid Noise Canceling Cardioid Microphone for Vocals with XLR

OUR PART #:  CM311A

Developed for and with major performing musicians reaching for clarity with increased gain before feedback. Crown’s differoid concept was perfect for the task.
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Our Price: $559.00
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AKG CM311A
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Developed for and with major performing musicians reaching for clarity with increased gain before feedback. Crown’s differoid concept was perfect for the task. The CM311A increases gain before feedback by as much as 6-12dB. The Crown CM311A only transmits what is the differential of the front and back elements increasing rejection of unwanted background noise and discriminates against distant sound sources such as monitor loudspeakers and instruments. Solve your on-stage problems with a hands free CM311A. The CM311A terminates in a belt clip housing that can be phantom powered or battery powered. It has XLR out as well as a line out to feed a wireless transmitter. The CM311A/E is provided with stripped leads and a wiring diagram for popular wireless systems. CM312A has a standard cardioid element.

Crown CM311A Specifications:

  • Transducer type: Electret condenser
  • Frequency response (typical): 50 Hz to 17 kHz
  • Polar pattern: Cardioid
  • Impedance: 75 ohms balanced
  • Recommended load impedance: 1000 ohms or greater
  • Open-circuit sensitivity, typical, close-talking: 4mV/Pa (-48 dB re 1V/Pa)
  • Power sensitivity, typical, close-talking: -42.5 dB re 1 mW/Pa
  • Equivalent noise level (self noise): 26 dB SPL typical, A-weighted
  • S/N ratio: 68 dB at 94 dB SPL
  • Maximum SPL: 148 dB SPL produces 3% THD
  • Operating voltage: 9V DC internal alkaline battery or 18-48V phantom power
  • Polarity: Positive pressure on diaphragm produces positive voltage on XLR pin 2 with respect to pin 3
  • Current drain: 6.5 mA nominal
  • Battery life: 85 hours
  • Off-attenuation: 70 dB
  • Output connectors: 3-pin pro audio (XLR type)
  • Cables: 2-conductor shielded, unbalanced cable, 42" (106.68 cm) from headband to battery pack. Use 2-conductor shielded mic cable (not included) between XLR connector and mixer mic input
  • Materials: High-impact plastic mic housing, brass boom, steel wire headband, high-impact plastic and steel battery pack
  • Finish: Satin black
  • Net weight:
    • Head-worn mic: 2.1 oz (61 g)
    • Belt pack and battery: 6.1 oz (173 g)
  • Dimensions:
    • Headband: 5.5" (13.97 cm) diameter, adjustable
    • Boom: approx. 7" (17.78 cm) x 3" (7.62 cm)
  • Included accessories: Microphone carrying case, WS-6 foam pop filter, clothing clip
Foam Cheek Pad for CM311 and CM312
Crown D8399-4 Foam Cheek Pad for CM311 and CM312
Foam cheek pad for Crown CM311 and CM312 headmics.
2.62 2.99 12

In Stock
CM311 Replacement Foam Pop Filter
Crown M45887-3 CM311 Replacement Foam Pop Filter
Snap-on foam pop filter for the Crown CM311 condenser mic.
21.95 26.00 16

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