The AKG CK31 is a cardioid microphone capsule designed for use with the DAM (Discreet Acoustics Modular) Series mounting modules. The cardioid polar pattern minimizes noise and ambiance at the off-axis (sides) of the microphone. The result increases directivity and provides high gain-before-feedback response when using near speakers or monitors.

The wide frequency response of 50 Hz to 20 kHz minimizes low-frequency noise caused by wind and proximity effect while reproducing audio signal with great accuracy and rich detail. The module design allows quick and easy capsule replacement for added flexibility. The package includes a special two-part windscreen, which efficiently reduces wind and pop noise.