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Bedienungsanleitung
Instructions for use
Notice d‘emploi
Istruzoni per l‘uso
Instrucciones de uso
Gebruiksaanwijzing
912 S
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912 S
The boundary microphone 912 S is a high-quality, prepolarized 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.
An internal DIP switch bank provides the following operating modes: y
On/off (factory preset) y
Push-to-talk button (PTT) y
Push-to-mute button (PTM) y
Permanently switched on
The frequency response curve can be changed via a second DIP switch bank: y
Low cut y
Low and high boost (factory preset) y
Low boost y linear (= frequency response curve of the 912)
The 912 S is available in three different finishes: y y y
912 S BK (black)
912 S WH (white)
Cat. No. 500875
Cat. No. 500876
912 S NX (Nextel non-reflecting gray) Cat. No. 502193
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Features
y
Programmable membrane switch y
Programmable frequency response curve y
Very unobtrusive due to flat design y
Extremely rugged sound inlet basket y
Rubber damping plate on base to minimize structure-born noise y
Mounting slots for mounting the microphone to table tops, lecterns, etc.
y
Gold-plated XLR connector y
Integrated electronics (instead of in-line preamp)
Delivery includes
y
912 S boundary microphone y
Pouch y
Instructions for use y
Warranty Certificate
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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
Altar or lectern: on a sound-reflecting surface
Conference rooms: lying on the table; directed towards the conference participants *)
Sound result Comments
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
Less room resonance in contrast to freestanding microphones
Microphones must not be covered by papers, folders or similar objects
*) The cardioid pick-up pattern has an opening angle of approx.
130°. Try to position the microphone so that the sound source
(conference participant, speaker or instrument) is located in this angle area (see polar diagram).
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Setting the operating mode and frequency response curve
쐃 쐇
4
DIP switch bank:
(visible when rear side is open)
쐃
Operating mode
쐇 Frequency response curve
Position of
DIP switches
Operating mode
쐃
Permanently switched on (ON)
1 2 3 4
Push-to-talk button (PTT)
1 2 3 4
Push-to-mute button (PTM)
1 2 3 4
On/off (factory preset)
1 2 3 4
Position of
DIP switches
1 2 3 4
Frequency response curve
쐇
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
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Operating Mode
쐃: y
Permanently switched on: disables the switch completely, the microphone is permanently switched on.
y
Push-to-talk (PTT):
The microphone is switched on as long as the membrane switch is pressed.
y
Push-to-mute (PTM):
The microphone is switched off as long as the membrane switch is pressed.
y
On/off (factory preset): turns the switch into push to switch on, push again to switch off.
Frequency response curve
쐇: y
Low cut: reduces the bass frequencies to minimize structure-born noise – this switch (1) is independent of the other three DIP switches and can be used in any of the following conditions
(eg: you can use the low cut as well as the bass boost if placing the microphone on a small table with a high risk of structure-born noise).
y
Low boost: extends the bass response to compensate for putting the microphone on a small table.
y
Low and high boost (factory preset): extends the frequency response at both ends.
y
Linear: is the natural response of the microphone.
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Polar diagram
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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
Linear ( 912)
Low boost
500 1000 2000 5000 10000 20000 Hz
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Specifications
Transducer principle
Frequency response
Connector
Weight
Dimensions pre-polarized condenser microphone
20 – 20,000 Hz
Pick-up pattern
Sensitivity (free field, no load)
(1 kHz)
Nominal impedance (1 kHz)
Min. terminating impedance half-cardioid
6 mV/Pa (factory preset)
10 mV/Pa (lin)
<100
Ω
1 k
Ω
Phantom powering 48 V/2.8 mA
Max. sound pressure level (1 kHz) 134 dB SPL
XLR-3
550 g
L: 126.5 mm
W: 105 mm
H: 26.5 mm
Pin assignment of XLR-3 connector
+
+
2
3
1
1
3
2
+
XLR XLR
+
2
3
1
XLR
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Overview of microphone applications
Variant
Application
Vocals
Choirs
Studio, acoustic instruments
Orchestra
Trumpet, trombone
Saxophone
Acoustic guitar
Acoustic bass
Guitar amplifiers
Bass amplifiers
Leslie
Piano, grand piano
Kick drums
Snare drums
Rack toms
Floor toms
Congas
Cymbals
Percussion
Conference table, altar
Lectern
Theater stage x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
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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.
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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. 09/07 516585/A03
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