Sennheiser P48 User Manual download pdf (Page 6)

According to the DINstandard the teed resistors should be

2 xappx. 6,8 kD. The difference between the two resistors should be

;;;;004% The current taken by Sennheiser condenser microphones

MKH... P48, is appx. 2 mA.

This means that approx. 7 volts are lost across the resistors.

Sennheiser condenser microphones produce relatively high output

voltages exceeding 1 volt at maximum sound pressure levels. This

has the advantage that even with long cables induced interference

signals can be disregarded. Also the internal noise produced by the

microphone does not contribute to the total noise level. The micro-

phones are titted with RF tilters which ensure that no high trequency

signals trom the microphone can affect the external circuitry and

that the microphone itselt is protected trom high trequency disturb-

ance. It is theretore not necessary, even under the most difficult

conditions, to take special precautions, such as double screening

ot the cables or the provision ot high trequency tilters.

Senn heiser condenser microphones are polarised according to DIN

standard i.e. when apressure pulse strikes the capsule trom the

tront Pin 1 ot the DIN-connector (resp. Pin 2 ot the Cannon-connec-

tor) goes positive with reterence to Pin 3. This should be considered

when e. g. the amplitier input plug is being wired for correct

phasing.

MKH 406 P 48

Frequency response.

Operating principle .

Directional characteristic.

Sensitlvityat 1000 Hz.

Impedance at 1000 Hz.

Connection to balanced inputs

Phantom-powered microphones are generally to be connected to

balanced ground-tree transtormer inputs.

In this case the microphone is simply connected via the power

supply MZN 16 P 48 resp. MZN 16 P 48-U (see accessories) to the

inputs ot the amplitier.

Minimum load.

Signal to noise ratio to DIN 45590.

Maximal SPL .

Operating voltage.

Current taken. . . . .

Temperature range

Output plug.

Prnconnections.

. 3-pln standard

plug to DIN 41 524

1: Audio (+);

Supply (+)

2: Ground, housrng;

Supply (-)

3: Audio (-);

Supply (+) according

to DIN 45596

Connection to unbalanced inputs

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

socket is unbalanced. It a phantom-powered microphones is to be

connected to such inputs it is generally necessary to use a transtor-

mer. The secondary of this audio-transtormer may then be connec-

ted - one side grounded - to the input. Proper voltage matching is

achieved by selecting a suitable transtormer ratio.

Cable connector.

MKH 406 P 48-U

40...20000 Hz

.. pressure gradient

transducer

card ioid

20 mV/Pa:!: 1 dB

(2 mVl~bar:!:1 dB)

appx. 10.0, balanced,

ground-free

1 k.o (200.0 for

SPL up to 30 Pa)

appx. 72 dB

75 Pa

48V:!: 12V

ca. 2 mA

-10°Cto+70°C

3-pin XLR plug

1: Ground, housing;

Supply (-)

2: Audio (+);

Supply (+)

3: Audio (-);

Supply (+) accordlng

to IECstandard

Publication 268-14/2

3-prn connector

XLR-3-11 C

Dimensions.

Weight.

Finish.

3-pln standard connector

to DIN 41524

e.g. T 3261001

19 mm </;,150 mm long 19 mm </;,165 mm long

120 9 135 9

dull black or satin nickel

Connection to inputs with high sensitivity

It the unit being used has a very high input sensitivity i.e. when it is

normally intended tor use with dynamic microphones, it can be

necessary to reduce the output voltage trom the microphone by

means ot a voltage divider. This should be built into the micro-

phone cable at the units input. This way the large signal on the

microphone cable is maintained up to just betore the amplitier,

wh ich helps to increase the signal to noise ratio.

We reserve the right to alter speciflcation. especially with regard to technical

improvements.

Standard response curve with tolerances MKH 406 P 48.

The original diagram is included with each microphone, measured

trom 50- 20000 Hz.

Connection to units with powering facilities

It an appropriate voltage source is available in the amplitier the

condenser microphone can be powered directly. The voltage

should be 48 volts :t 12 volts. It should be stabilised and tiltered, so

that the unweighted noise voltage is less than 1 mV.

Frequency Response

i---r ~

I 'L I

:.A ~:

I I

c---I ~

20020 50 100 500 1000

Phantom-powering 48 V

according to DIN 45596

alternatively

48V 3,3 kQ

Accessories for MKH 406 P 48/ MKH 406 P 48-U

Microphone Clamp MZQ 415

The clamp can be titted on tripods, booms etc. with %" threads.

2000

50OJ 10000 20000 Hz

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Sennheiser P48 User Manual Page 6

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