The microphones feature Dual Backplate MEMS technology, based on a miniaturised symmetrical microphone design, as utilised in studio condenser microphones. This results in high linearity of the output signal within a dynamic range of 95dB for the IM69D120 and 105dB for the IM69D130. This is combined with an exceptionally low distortion level of 10 percent at a sound pressure level (SPL) of 135dB.

The microphone distortion does not exceed 1%, even at sound pressure levels of 128dBSPL. The flat frequency response (28Hz low-frequency roll-off) and tight manufacturing tolerance result in close phase matching of the microphones, which is important for multi-microphone (array) applications. The microphones are housed in 4x3x1.2mm MEMS packages and are suited for high-quality acoustic recordings and far-field voice capturing applications.