AKG Acoustics GmbH

CHM 21




  • Cardioid polar pattern
  • 10 m (33 ft.) cable
  • 125° pickup angle
  • Especially suited for choir recordings
  • Integrated spring steel clamp for optimum alignment

The new Discreet Acoustics Compact Series Condenser Hanging Microphone provides both ease of use and a high level of functionality. There is hardly any more affordable and simpler solution for recording choirs at worship centers. Suspended from the ceiling or a beam, the hanging microphone is aligned and then fixed in the correct position. Now use the spring steel clamp to adjust the correct angle, and off you go!

XY stereo recording

Using two CHM 21 hanging microphones in an XY configuration (coincident pair) is a good way to make stereo recordings, particularly of choirs. However, sound source locations are defined only by intensity differences. Adjusting the angle between the microphones determines the width and depth of the stereo image.

ORTF stereo recording

Developed by the French Broadcasting Authority, this technique differs from the XY technique by recording not only intensity differences, but also delay differences. The capsules are aligned at an angle of precisely 110° and 170 mm / 6.7 in. apart.

© 2010 AKG Acoustics GmbH

The microphone shall be a cardioid microphone for flown use with a non-twisting cable. Its pickup angle shall be 125 degrees; frequency range 70 Hz to 18 kHz; sensitivity 18 mV/Pa; max. SPL 125 dB; electrical impedance <600 ohms for 9 to 52 V phantom power. The microphone shall be finished in matte dark gray and fitted with a 10 m cable. It shall measure approx. 13.5 x 55 mm and its net weight shall be 20 grams, its shipping weight 480 grams.
 


Polar patternCardioid
Frequency range70 to 18,000 Hz
Sensitivity18 mV/PA = -35 dBV re 1 V/Pa
Max. SPL125 dB (for 1% THD)
Equivalent noise level<21 dB-A
Signal/noise ratio (A-weighted)>73 dB
Impedance<=600 ohms
Recommended load impedance>=2,000 ohms
Supply voltage9 to 52 V phantom power to DIN 45596 (DPA adapter integrated)
Powering<3 mA
Connector3-pin male XLR
Finishmatte dark grey
Net weight20 g (0.7 in.)
Shipping weight480 g (17 oz.)


CHM 21
High-resolution image (JPG, 117.29 KB)