Sennheiser Evolution 912 S BK Manual de usuario
912 S
Bedienungsanleitung
Instructions for use
Notice d‘emploi
Istruzoni per l‘uso
Instrucciones de uso
Gebruiksaanwijzing
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1
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.
An internal DIP switch bank provides the following operating
modes:
yOn/off (factory preset)
yPush-to-talk button (PTT)
yPush-to-mute button (PTM)
yPermanently switched on
The frequency response curve can be changed via a second DIP
switch bank:
yLow cut
yLow and high boost (factory preset)
yLow boost
ylinear (= frequency response curve of the 912)
The 912 S is available in three different finishes:
y912 S BK (black) Cat. No. 500875
y912 S WH (white) Cat. No. 500876
y912 S NX (Nextel non-reflecting gray) Cat. No. 502193
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2
Features
yProgrammable membrane switch
yProgrammable frequency response curve
yVery unobtrusive due to flat design
yExtremely rugged sound inlet basket
yRubber damping plate on base to minimize structure-born
noise
yMounting slots for mounting the microphone to table tops,
lecterns, etc.
yGold-plated XLR connector
yIntegrated electronics (instead of in-line preamp)
Delivery includes
y912 S boundary microphone
yPouch
yInstructions for use
yWarranty Certificate
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3
Postioning the microphone
Boundary microphones make use of the pressure effects at a
room boundary and need to be mounted on a flat surface:
*) 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).
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 micro-
phones
Unobtrusive due to
flat design; no micro-
phones in the field of
vision
Conference rooms:
lying on the table;
directed towards the
conference
participants *)
Less room resonance
in contrast to
freestanding
microphones
Microphones must
not be covered by
papers, folders or
similar objects
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4
Setting the operating mode and frequency
response curve
Position of
DIP switches
Operating
mode 쐃
Position of
DIP switches
Frequency
response curve 쐇
Permanently
switched on (ON)
Low cut, can be
used in all
operating modes
Push-to-talk
button (PTT)
Low boost
Push-to-mute
button (PTM)
Low and high
boost (factory
preset)
On/off (factory
preset)
linear
쐃쐇
DIP switch bank:
(visible when rear side
is open)
쐃Operating mode
쐇Frequency response curve
1 2 3 4
1 2 3 4
1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4
1 2 3 4
1 2 3 4
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5
Operating Mode 쐃:
yPermanently switched on:
disables the switch completely, the microphone is
permanently switched on.
yPush-to-talk (PTT):
The microphone is switched on as long as the membrane
switch is pressed.
yPush-to-mute (PTM):
The microphone is switched off as long as the membrane
switch is pressed.
yOn/off (factory preset):
turns the switch into push to switch on, push again to switch
off.
Frequency response curve 쐇:
yLow 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).
yLow boost:
extends the bass response to compensate for putting the
microphone on a small table.
yLow and high boost (factory preset):
extends the frequency response at both ends.
yLinear:
is the natural response of the microphone.
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6
Polar diagram
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7
Frequency response curve
- 40
- 50
- 60
- 70
- 80
20 50 100 200 500 1000 2000 5000 10000 20000 Hz
Low and high boost (factory preset)
- 30
dBv
Rumble filter (low cut)
Low boost
Linear ( 912)
- 40
- 50
- 60
- 70
- 80
20 50 100 200 500 1000 2000 5000 10000 20000 Hz
- 30
dBv
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8
Specifications
Pin assignment of XLR-3 connector
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 Ω
Min. terminating impedance 1 kΩ
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: 26.5 mm
12
3
12
3
++
12
3
XLR
+
XLRXLR
+
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