The MKH 20 is mainly used as a main microphone for orchestras and solo instruments, and picks up the natural acoustics of the room, though it does have a much wider range of applications as omnidirectional microphones do not suffer from 'proximity effect'. Features: Exceptionally flat frequency response, switchable for near and diffuse field applications High frequency response can be accentuated by means of a pressure build-up ring  Slightly increasing directivity at high frequencies to adjust tonal balance Exceptionally low inherent self-noise Transformer less and fully floating balanced output Switchable pre-attenuation Black, anodized light metal casing Supply schedule: 1 MKH 20, 1 MZS 40 shock mount, 1 MZW 41 windshield, 1 pressure build up ring Technical Data:Pick-up pattern: omnidirectional Frequency response: 12-20,000 Hz Sensitivity (free field, no load) (1 kHz): (25(8) mV/Pa +/- 1 db Nominal impedance: 150 hms Min. terminating impedance: 1000 ohms Equivalent noise level A-weighted (DIN IEC 651) CCIR- weighted (CCIR 468-3): 10 (18) DB 20 (28) DB Max. sound pressure level: 134 (142) dB at 1 kHz Power supply: phantom 48 +/- 4 Supply current 2mA Dimensions in mm O 25 x 153 Weight: approx. 100g Values in parenthesis with attenuator switched (-10 dB)