Sennheiser Evolution 912 S BK User manual

912 S

Bedienungsanleitung

Instructions for use

Notice d‘emploi

Istruzoni per l‘uso

Instrucciones de uso

Gebruiksaanwijzing

e 912 S_516585_0207_Sp6.book Seite 1 Freitag, 28. September 2007 11:09 11

e 912 S_516585_0207_Sp6.book Seite 2 Freitag, 28. September 2007 11:09 11

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

e 912 S_516585_0207_Sp6.book Seite 1 Freitag, 28. September 2007 11:09 11

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

e 912 S_516585_0207_Sp6.book Seite 2 Freitag, 28. September 2007 11:09 11

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

e 912 S_516585_0207_Sp6.book Seite 3 Freitag, 28. September 2007 11:09 11

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

e 912 S_516585_0207_Sp6.book Seite 4 Freitag, 28. September 2007 11:09 11

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.

e 912 S_516585_0207_Sp6.book Seite 5 Freitag, 28. September 2007 11:09 11

Polar diagram

e 912 S_516585_0207_Sp6.book Seite 6 Freitag, 28. September 2007 11:09 11

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

e 912 S_516585_0207_Sp6.book Seite 7 Freitag, 28. September 2007 11:09 11

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

XLR

XLRXLR

e 912 S_516585_0207_Sp6.book Seite 8 Freitag, 28. September 2007 11:09 11

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