AKG CBL31 WLS Boundary Layer Microphone for Wireless Use


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The AKG CBL31 WLS is a heavy duty Boundary Layer Microphone, which can function wirelessly when combined with a selection of AKG’s Wireless Systems. The CBL31 itself features the same cardioid capsule used in the HM1000CK31, which means that it has a cardioid pickup pattern which works on a 120° angle.

This allows for more mobility in front of the microphone, making it ideal for presentation or conferencing purposes. The CBL31 can be upgraded to operate wirelessly, which does require an additional wireless system which is not included. Given that the audio output on the CBL31 is via a mini XLRF this is the way we would recommend that the product is used, as it truly expands the functionality of the microphone.

It is compatible with the AKG WMS40 or WMS470 Systems, and you would need to ensure that you have a compatible input on your system to allow for connection to the wireless receiver. Not sure how all this would work with what you have? Feel free to provide our sales team with a description or pictures of your setup, just contact them via sales@blaydoncomms.co.uk and they’ll be happy to help you work things out.

The belt pack transmitter from the wireless system connects to the CBL31 and will fit right into the housing on the back of the microphone, transforming it into a completely wireless solution. There is a rugged mute switch capable of withstanding more than 25,000 switching cycles, as well as an LED bar which clearly shows whether you’re live or not.


  • Sensitivity: 20 mV/Pa
  • Polar Pattern: Cardioid
  • SignaltoNoise: 73 dB-A
  • Equivalent Noise Level: 21 dB-A
  • Design: Body: Metal. Finish: Matte Black
  • Dimensions: 45 mm H x 107 mm W x 145 L
  • Audio Frequency Bandwidth: 50 – 20000Hz
  • Audio Output: Type: Mini XLR. Contacts: 3-pin
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