In this case the microphone is simply connected via the power supply
MZN 16 P48 resp. MZN 16 P48-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, which helps to increase the signal to noise ratio.
Connection to Amplifiers with Defined Input Impedances
Sennheiser studio condenser microphones can be connected directly to
all amplifiers whose input impedance is larger than 200 Q. This is usual
inthe 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 isdemanded. 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 inthe amplifierthe condenser
microphone 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-
denser microphones MKH . . . P48 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.
,
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alternatively
3.3kQ
48V
Phantom-powering 48 V
according to DIN 45596
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.
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.
MKH124
MKH125 T
MKH 125 T-U MKH 126 P 48 MKH 126 P 48-U
Frequency response. .
Direclional characlerislic . . . .
Open circuiloulpul vollage al 1000 Hz
Source impedance al 1000 Hz
Minimalload impedance ...
Oulpul level re. 1 mW/10 dynes/cm2
S/N ralio(DIN45 590)
Operating voltage
Currenldrawn .
Temperature range
Connections
Microphone
HF-section
Connectors
Microphone ~ HFseclion
HFsection~ Amplilier
Dimensions in mm
Microphone MK12
HFseclion . .
Weighlol microphone
Finish MK12
40...20000 Hz
omnidireclional
appx. 3.2 mV/Pa
appx. 150 Q
2kQ
-53.5dB
62 dB
8V:t 2V
appx. 5 mA
-10'Clo + 70'C
1-pin LEMO-RF-plug
6-pin plug T3402 000
1,2, 5,~ 0.3~-8 V
4 ~ signal
Lemo F00250/ AG/3 10
Lemo RC 00250/ AG/3
Tuchel T3403 000
11.5 x36 x 12
27 0 x 43
appx. 91 9
satin nickel,
dull black and TV-grey
40. .20000 Hz
omnidirectional
appx. 20 mV/Pa
appx. 20 Q
200 Q
-27.8dB
62dB
12V:t 2V
appx. 6 mA
-10' C 10+ 70' C
1-pin LEMORF-plug
3-pin plug10DIN41524
1~ signal
2 ~ case, 3 ~ signal
to DIN 45595
Lemo F00250/ AG/3 to
Lemo RA00250
DIN3-pin i. e.T3261 001
11.5x 36x 12
190x 140
1009
satinnickel,
duI1blackandTV-grey
14
WereserveIhe righlto aller specilicalions, in particularwith regard10lechnical improvements.
40. .20000 Hz
omnidireclional
appx.20 mV/Pa
appx.20 Q
200 Q
-27.8dB
52 dB
12V:t 2V
appx.6 mA
-10'Clo + 70'C
1-pin LEMO RF-plug
Cannon 3-pin XLR-3
1 ~ case
2~ case,3~ signal
Lemo F00250/ AG/3 10
Lemo RA 00250
XLR-3-11 C
11.5x 36x 12
190x155
110 9
salmnickel,
dull blackandTV-grey
40. .20000 Hz
omnidireclional
appx.20 mV/Pa
appx.20 Q
600Q(200Q up1030 Pa)
-32dB
62 dB
48V:t 12V
appx.2 mA
-10'Clo + 70'C
1-pm LEMO RF-plug
3-pin plug 10DIN 41 524
1~ signal,2~ case,
3~ signal 10 DIN 45 596
Lemo F 00250/ AG/3 10
Lemo RA 00250
DIN 3-pin i.e. T3261001
11.5 x 36 x 12
190140
100 9
salin nickel,
dull black
40. .20000 Hz
omnidtreclional
appx.20 mV/Pa
appx.20 Q
600 Q (200Q up1030 Pa)
-32dB
62 dB
48V:t 12V
appx.2 mA
-lO'Clo + 70'C
l-pin LEMO RF-plug
Cannon3-pin XLR-3
1~ case,2~ signal,
3~ signal
Lemo F00250/ AG/3 10
Lemo RA 00250
XLR-3-11 C
11.5 x 36 x 12
190x 155
1109
salin nickel.
dullblack
15
f=
T10dB
- -
f=
-- -
--
-
-
-
E
MK12
-
- -
- -. -
r=
MKH124
-
f=
MKH125T
t=
MKH 125P48
