The MM 302 is a 1/4-inch measurement microphone featuring an externally polarized MK 301 capsule. It operates across a frequency range of 5 Hz to 100 kHz (±2 dB) with a dynamic range from 35 dBA to 168 dB. Designed as a capacitive pressure receiver per WS3F (DIN EN IEC 61094-4), it connects via a fixed 3-meter cable with 7-pin LEMO connector. Suitable for precision reference measurements and calibration, it requires external polarization (200 V) and can be calibrated using a pistonphone type 5002 with a 1/4" adapter. The recommended MH 64 holder accommodates standard 1/4" accessories like windshields.