Sennheiser Microphone 912 S User Manual

912 S  
Bedienungsanleitung  
Instructions for use  
Notice d‘emploi  
Istruzoni per l‘uso  
Instrucciones de uso  
Gebruiksaanwijzing  
 
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:  
y
y
y
y
On/off (factory preset)  
Push-to-talk button (PTT)  
Push-to-mute button (PTM)  
Permanently switched on  
The frequency response curve can be changed via a second DIP  
switch bank:  
y
y
y
y
Low cut  
Low and high boost (factory preset)  
Low boost  
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  
1
 
Features  
y
y
y
y
y
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  
y
Mounting slots for mounting the microphone to table tops,  
lecterns, etc.  
y
y
Gold-plated XLR connector  
Integrated electronics (instead of in-line preamp)  
Delivery includes  
y
y
y
y
912 S boundary microphone  
Pouch  
Instructions for use  
Warranty Certificate  
2
 
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:  
Less room resonance Unobtrusive due to  
on a sound-reflecting portions or comb filter flat design; no micro-  
surface  
elements; improved  
speech intelligibility  
and greater gain  
reserves in contrast to  
freestanding micro-  
phones  
phones in the field of  
vision  
Conference rooms:  
lying on the table;  
directed towards the freestanding  
Less room resonance Microphones must  
in contrast to  
not be covered by  
papers, folders or  
similar objects  
conference  
microphones  
participants *)  
*) 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).  
3
 
Setting the operating mode and frequency  
response curve  
³
·
DIP switch bank:  
(visible when rear side  
is open)  
³ Operating mode  
· Frequency response curve  
Position of  
Operating  
Position of  
Frequency  
DIP switches mode ³  
DIP switches response curve ·  
Permanently  
switched on (ON)  
Low cut, can be  
used in all  
operating modes  
1
2
3
4
1
2
3
4
Push-to-talk  
button (PTT)  
Low boost  
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
Push-to-mute  
button (PTM)  
Low and high  
boost (factory  
preset)  
On/off (factory  
preset)  
linear  
1
2
3
4
1
2
3
4
4
 
Operating Mode ³:  
y
y
y
y
Permanently switched on:  
disables the switch completely, the microphone is  
permanently switched on.  
Push-to-talk (PTT):  
The microphone is switched on as long as the membrane  
switch is pressed.  
Push-to-mute (PTM):  
The microphone is switched off as long as the membrane  
switch is pressed.  
On/off (factory preset):  
turns the switch into push to switch on, push again to switch  
off.  
Frequency response curve ·:  
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
y
Low and high boost (factory preset):  
extends the frequency response at both ends.  
Linear:  
is the natural response of the microphone.  
5
 
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  
Pick-up pattern  
20 – 20,000 Hz  
half-cardioid  
Sensitivity (free field, no load)  
(1 kHz)  
6 mV/Pa (factory preset)  
10 mV/Pa (lin)  
Nominal impedance (1 kHz)  
Min. terminating impedance  
Phantom powering  
<100 Ω  
1 kΩ  
48 V/2.8 mA  
Max. sound pressure level (1 kHz) 134 dB SPL  
Connector  
Weight  
XLR-3  
550 g  
Dimensions  
L: 126.5 mm  
W: 105 mm  
H: 26.5 mm  
Pin assignment of XLR-3 connector  
+
+
+
+
1
2
2
1
2
1
3
3
3
XLR  
XLR  
XLR  
8
 
Overview of microphone applications  
Variant  
Application  
Vocals  
x
Choirs  
x
x
x
x
Studio, acoustic  
instruments  
x
Orchestra  
x
Trumpet, trombone  
Saxophone  
x
x
x
x
x
x
Acoustic guitar  
Acoustic bass  
Guitar amplifiers  
Bass amplifiers  
Leslie  
x
x
x
x
x
x
x
x
x
Piano, grand piano  
Kick drums  
x
x
x
x
Snare drums  
Rack toms  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Floor toms  
Congas  
Cymbals  
x
x
Percussion  
x
x
x
x
Conference table,  
altar  
x
x
Lectern  
x
x
x
x
Theater stage  
9
 
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.  
10  
 
Sennheiser electronic GmbH & Co. KG  
30900 Wedemark, Germany  
Phone +49 (5130) 600 0  
Fax +49 (5130) 600 300  
Printed in Germany  
Publ. 09/07  
516585/A03  
 

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