Operation - Beyerdynamic DT 250 Mode D'emploi

DT 25x / DT 28x / DT 29x
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3. Connection
The DT 250 / DT 252 headphones are supplied with an appropriate connecting
cable. The the DT 280 / DT 290 / DT 297 headsets are supplied without
connecting cable. For appropriate connecting cables, please refer to "Optional
Accessories". Direct solder connections can be made to all cables with free ends
(for cable connection refer to "Block Diagram"). Upon request the required
plugs can be connected at the factory.
It is important that the external equipment the studio headphones or the head-
sets will be connected to are of good quality and of the correct impedance and
power ratings to get the best performance from them. Please refer to the
"Technical Specifications" for detailed information.
The microphone of the DT 280 / DT 290 headset is designed for balanced
connection. But it can be also connected to unbalanced microphone inputs.
The DT 297 PV headset is suitable for the connection to balanced microphone
inputs with phantom power. At a distance of 5 cm the microphone level is 13 mV
or 250 mV.
Use the DT 280 headset with integrated preamp for connecting to TV cameras
with a microphone input for AB-powering. At a distance of 5 cm the microphone
level can be adjusted between 52 mV and 1.3 V at normal speech volumes.

4. Operation

The head phones are fully adjustable and should be positioned for the best fit
over the ears. This will give maximum long-term comfort and will minimise sound
leakage or spill.
The microphone should be positioned to the side of the mouth, about
20 - 30 mm forward. This will keep it within the direct sound path but out of
breath stream, therefore minimising any 'pop' sounds.
All versions:
The microphone boom is rotatable so that the
microphone can be placed over the left or right
ear.