Soyuz SU-017, tube condenser microphone, rich and warm sound, capsules: two 34mm membranes (one gold sputtered), acoustical operating: pressure-gradient transducer, pollar pattern: cardioid capsule with gold-sputtered hand-tuned 34mm diaphragm, frequency range: 20 - 20000 hz, sensitivity: 16mv/pa, impedance: 270 ohms, spl: 120 db (a-weighted), equivakent noise: less than 20db (a-weighted), tube type: 6g1p, power: dedicated bp-017 power supply, includes: su-017 wooden storage case, bp-017 power supply, 6 pin microphone cable and su-017 shock mount, handmade in Russia, size length x diameter: 226 x 55 mm, weight: 950g