In this case the microphone is simply connected via the power supply MZN 16 P48 resp. MZN 16 P 48-U (see accessories) to the inputs ofthe amplifier.

Connection to Amplifiers with unbalanced Inputs

In many cases, for example most home-tape recorders, the input socket

is unbalanced. If a phantom-powered microphone is to be connected to such inputs it is generally necessary to use a transformer. The secondary

of this audio-transformer may then be connected - one side grounded-

to the input. Proper voltage matching is achieved by selecting a suitable transformer ratio.

Connection to Amplifiers with High Input Sensitivity

If the amplifier being used has a very high input sensitivity i. e. when it is normally intended for use with dynamic microphones, it can be necessary to reduce the output voltage from the microphone by means of a voltage divider. This should be built into the microphone cable at the amplifier input. This waythe large signal on the microphone cable is maintained up to just before the amplifier, wh ich helps to increase the signal to noise ratio.

Connection to Amplifiers with Defined Input Impedances

Senn heiser studio condenser microphones can be connected directly to all amplifiers whose input impedance is larger than 200 Q. This is usual in the majority of cases. Should - however - the input impedance be smaller than 200 Q, a resistor of appropriate value should be placed in series with the microphone so that it "sees" at least 200 Q. The voltage division caused by this series resistor must, of course, be considered. The same method can be used when a higher output impedance of the microphone is demanded. In this case again, aseries resistor can be used to provide correct matching.

Connection to Amplifiers with Powering Facilities

If an appropriate voltage source is available in the amplifierthe condensermicrophone can be powered directly. The voltage should be

48 volts:!: 12 volts. It should be stabilised and filtered, thatthe unweighted noise voltage is less than 1 mV. The current taken by Sennheiser con-

 

 

 

MKH124

 

 

MKH125 T

Frequency response.

.

40...20000

Hz

 

40. .20000 Hz

Direclional characlerislic

. . . .

omnidireclional

 

omnidirectional

Open circuil oulpul vollage al 1000 Hz

appx. 3.2 mV/Pa

 

appx. 20 mV/Pa

Source impedance

al 1000 Hz

appx. 150 Q

 

appx. 20 Q

Minimalload impedance

...

2kQ

 

 

 

200 Q

Oulpul level re. 1 mW/10 dynes/cm2

-53.5dB

 

 

-27.8dB

62 dB

 

 

62dB

S/N ralio (DIN 45 590)

 

 

 

 

8V:t

2V

 

 

12V:t 2V

Operating voltage

 

 

 

 

Currenldrawn

.

 

appx. 5 mA

 

appx. 6 mA

Temperature range

 

 

-10'Clo

+ 70'C

 

-10'

C 10 + 70' C

Connections

 

 

1-pinLEMO-RF-plug

1-pin LEMO RF-plug

Microphone

 

 

HF-section

 

 

6-pin plug T 3402 000

3-pin plug 10 DIN 41524

 

 

 

1,2, 5,~

0.3~-8

V

1 ~signal

 

 

 

4 ~

signal

 

2 ~

case, 3 ~ signal

to DIN 45595

denser microphones MKH . . . P 48 is appx. 2 mA. According to the DIN standard the feed resistors should be 2 x appx. 6.8 kQ. The difference

between the two resistors should be ~ 0.4 %. This means that approx.7 volts are lost across the resistors.

 

i---r

i

 

[

 

I

I

ro

 

I

I

 

I

I

 

 

 

I

 

 

 

 

I

 

 

 

 

I

I

 

 

 

I

I

"

 

 

I

I

 

 

~---I

J

 

 

'"

 

,

Phantom-powering 48 V

<6

alternatively

 

 

 

accordingto DIN 45596

 

3.3 kQ

J

 

48V

 

 

 

 

 

 

 

MK 12 + SK 1007

The MK 12 can be connected directly to the studio pocket transmitter SK 1007. This transmitter already contains the electronic part.

f=

T10dB

 

 

 

 

 

- -

 

 

-- -

--

-

- -

f=

 

 

 

E

MK12

-

- - -

-

-. -

 

 

 

 

 

 

r=MKH124

 

 

 

 

 

f=

MKH125T

 

 

 

 

 

 

t= MKH 125P48

 

 

 

 

 

 

Standard frequency responsewith tolerance limits MKH 124, MKH 125 T and MKH 126 P 48.

To reduce low frequency interferences, electronic units MH 124, MH 125 T and MH 126 P 48 are equipped with a built-in roll-off filter. The frequency chart shows the corresponding response.

MKH 125 T-U

MKH 126

P 48

MKH 126

P 48-U

40. .20000 Hz

40. .20000 Hz

40. .20000 Hz

omnidireclional

omnidireclional

omnidtreclional

appx. 20 mV/Pa

appx. 20 mV/Pa

appx. 20 mV/Pa

appx. 20 Q

appx. 20 Q

appx. 20 Q

200 Q

 

600Q (200Q up 1030 Pa)

600 Q (200 Q up 1030 Pa)

-27.8dB

 

-32dB

 

-32dB

 

52 dB

 

62 dB

 

62 dB

 

12V:t

2V

48V:t 12V

48V:t 12V

appx. 6 mA

appx. 2 mA

appx.2 mA

-10'Clo

+ 70'C

-10'Clo

+ 70'C

-lO'Clo

+ 70'C

1-pin LEMO RF-plug

1-pm

LEMO RF-plug

l-pin

LEMO RF-plug

Cannon

3-pin XLR-3

3-pin

plug

10 DIN 41 524

Cannon 3-pin XLR-3

1 ~

case

1~

signal,2~ case,

1~

case,2~ signal,
2 ~case,3 ~ signal

3 ~

signal

10 DIN 45 596

3~

signal

 

Connectors

 

Lemo F 00250/ AG/3 10

Microphone ~

HF seclion

Lemo RC 00250/ AG/3

 

 

HF section~

Amplilier

Tuchel T 3403 000

Dimensions in mm

11 .5 x 36 x 12

Microphone MK12

HFseclion

. .

27 0 x 43

Weighlol microphone

appx. 91 9

Finish MK12

 

satin nickel,

dull black and TV-grey

Lemo F 00250/ AG/3 to Lemo RA 00250

DIN 3-pin i. e. T 3261 001

11.5x 36 x 12

19 0x 140

100 9

satin nickel, duI1black andTV-grey

Lemo F 00250/ AG/3 10

Lemo

F 00250/ AG/3 10

Lemo F 00250/ AG/3 10

Lemo RA 00250

Lemo

RA 00250

Lemo

RA 00250

XLR-3-11 C

DIN 3-pin

i. e. T 3261001

XLR-3-11 C

11.5 x 36 x 12

11.5

x 36

x 12

11.5 x 36 x 12

190x155

190140

 

190x

155

110 9

100 9

 

110 9

 

salm nickel,

salin

nickel,

salin nickel.

dull black andTV-grey

dull black

 

dull black

We reserveIhe righl to aller specilicalions, in particularwith regard10lechnical improvements.

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