Design Features - Beyerdynamic DT 250 Mode D'emploi

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OPERATING INSTRUCTIONS
DT 250 / DT 252 / DT 280 / DT 290 / DT 297
Thank you for selecting one of the DT 200 series professional studio headphones
or headsets. They have been made in Germany from high-grade materials and
assembled under stringent quality and performance tests to provide you with a
professional communications tool. Please take some time to read through this
instruction booklet to give you an idea of the design criterion and some
information on connection, use and maintenance.
1. Safety
When plugging in any of the DT 200 - series headsets to the drive amplifier, we
recommend that this is done before it is fitted over the ears for use. This will
give the technician the chance to check that the volume levels are not too high.
Please remember that the user could well be a highly-paid presenter and the
consequences of damaging his / her ears may well prove to be music to the ears
of the lawyer! The very low levels of distortion can make listening levels higher
than is perceived and we have to warn you that listening to programme or
talkback at high levels for long periods can permanently damage your hearing.

2. Design Features

DT 250 / DT 252
The DT 250 / DT 252 is a closed dynamic headphone offering excellent
ambient noise isolation making it suitable for all kinds of applica tions in broad-
casting and recording studios. The headband and earphone cushioning systems
have been carefully designed for maximum comfort and unobtrusive style. The
powerful neodymium magnet system provides high-fidelity reproduction and a
balanced sound. The standard impedance is 80 Ω. Furthermore, versions with
250 Ω systems are available. The connecting cables to the ear monitors run safely
in the headband and the main connecting cable is terminated on one side with
a multi-pin connector.
DT 280 / DT 290
Same as DT 250, but featuring the dynamic hypercardioid DM 290 microphone.
The DT 280 / DT 290 headset is used in intercom and talkback systems as well as
other applications where a dynamic microphone is required. The DT 280 has an
integrated microphone preamp for AB-powering.
DT 297
Same as DT 250, but featuring a cardioid condenser microphone. The DT 297 PV
is equipped with an integrated preamp for phantom powering.
DT 25x / DT 28x / DT 29x