Connection

The DT 250 / DT 252 headphones or the DT 280 / DT 290 / DT 290 V. 11 / DT 291 PV / DT 294 PV / DT 294 V.11 headsets are delivered with a single-sided,plug-in type connecting cable. In addition to this, special cables can be ordered. 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 DT 250 / DT 252 studio headphones or the DT 280 / DT 290 / DT 290 V.11 / DT 291 PV

/DT 294 PV / DT 294 V.11 headsets 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 / DT 290 V.11 headset is designed for balanced connection. But it can be also connected to unbalanced microphone inputs.

The DT 291 PV or DT 294 PV headsets are 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 290 V.11 / DT 294 V.11 headset with integrated pre- amp 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. The supply voltage for the pre-amplifier can vary between 6 - 27 V. The power consumption is at:

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DT 290 V.11

DT 294 V.11

6 V

Rvor 330 Ω

8 mA

6 mA

12 V

Rvor 330 Ω

23 mA

20 mA

20 V

Rvor 330 Ω

43 mA

40 mA

27 V

Rvor 330 Ω

61 mA

57 mA

19