912 S Instructions for use
912 S The boundary microphone 912 S is a high-quality, pre-polarized condenser microphone with half-cardioid pick-up pattern, designed for picking up speech. Due to its unobtrusive, flat design, it is ideally suited for use on conference tables, altars and lecterns. The microphone can be switched on and off via an integrated membrane switch. A red LED above the membrane switch lights up when the microphone is switched on.
Features • • • • • Programmable membrane switch Programmable frequency response curve Very unobtrusive due to flat design Extremely rugged sound inlet basket Rubber damping plate on base to minimize structure-born noise • Mounting slots for mounting the microphone to table tops, lecterns, etc.
Postioning the microphone Boundary microphones make use of the pressure effects at a room boundary and need to be mounted on a flat surface: Position Sound result Comments Altar or lectern: on a sound-reflecting surface Less room resonance portions or comb filter elements; improved speech intelligibility and greater gain reserves in contrast to freestanding microphones Unobtrusive due to flat design; no microphones in the field of vision Conference rooms: lying on the table; directed towards the confe
Setting the operating mode and frequency response curve 쐃 쐇 DIP switch bank: (visible when rear side is open) 쐃 Operating mode 쐇 Frequency response curve Position of DIP switches 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Operating mode 쐃 Permanently switched on* (ON) Push-to-talk button (PTT) Push-to-mute button (PTM) On*/off (ON/OFF), factory preset Position of DIP switches 1 2 3 4 Low cut, can be used in all operating modes Low boost 1 2 3 4 1 2 3 4 Low and high boost (factory preset) Linear 1 2 3 4
Operating Mode 쐃: • Permanently switched on (ON): disables the switch completely, the microphone is permanently switched on. The red LED on the top lights up. • Push-to-talk (PTT): The microphone is switched on as long as the membrane switch is pressed; the red LED on the top lights up. • Push-to-mute (PTM): The microphone is switched off as long as the membrane switch is pressed; the red LED on the top is off.
Polar diagram 6
Frequency response curve dBv - 30 - 40 - 50 - 60 - 70 - 80 20 50 100 200 500 1000 2000 5000 10000 20000 Hz Low and high boost (factory preset) Rumble filter (low cut) dBv - 30 - 40 - 50 - 60 - 70 - 80 20 50 100 200 500 1000 2000 5000 10000 20000 Hz Linear ( 912) Low boost 7
Specifications Transducer principle pre-polarized condenser microphone Frequency response 20 – 20,000 Hz Pick-up pattern half-cardioid Sensitivity (free field, no load) (1 kHz) 6 mV/Pa (factory preset) 10 mV/Pa (lin) Nominal impedance (1 kHz) < 100 Min. terminating impedance 1 k Phantom powering 48 V/2.8 mA Max. sound pressure level (1 kHz) 134 dB SPL Connector XLR-3 Weight 550 g Dimensions L: 126.5 mm W: 105 mm H: 26.
Vocals x Choirs Studio, acoustic instruments x x x x x Orchestra x Trumpet, trombone x x Saxophone x x x x Acoustic guitar x Acoustic bass x Guitar amplifiers x Bass amplifiers Leslie x x x x x Piano, grand piano Kick drums x x x x x Rack toms x x x x x x Congas x x Snare drums Floor toms x x x x x x x x x x x x Cymbals Percussion e935/e945 e914 e912 S e912 e908T ew e908D e908B e906 e905 e904 e902 Application e901 Variant e908B ew Overvie
Manufacturer Declarations Warranty 2 years CE Declaration of Conformity Sennheiser electronic GmbH & Co. KG declare that this device is in compliance with the applicable CE standards and regulations. WEEE Declaration Please dispose of this product by bringing it to your local collection point or recycling centre for such equipment.
Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany Phone +49 (5130) 600 0 Fax +49 (5130) 600 300 www.sennheiser.com Printed in Germany Publ.
