User manual BEYERDYNAMIC DT 290

[. . . ] They have been made in Germany from highgrade 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. 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 applications in broadcasting and recording studios. [. . . ] This will give maximum long-term comfort and will minimise sound leakage or spill. Convention states that the boom microphone is placed over the left ear. The microphone can be used from the right ear, but if true L and R headphone status needs to be maintained, it will be necessary to make a custom lead with the headphone connections reversed (swap brown/orange on the left side and red/blue on the right side). The DT 250 / DT 252 headphones are supplied with an appropriate connecting cable. The the DT 280 / DT 290 / DT 291 / DT 287 / 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"). Put the new ear-pad on the housing so that the drop-in pins can lock in the corresponding holes. Press the new ear-pad with the thumbs of both hands to the housing until you hear a clear "click" noise. 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. Order DT 291 PV Headset, 80 , condenser microphone (omnidirectional), with integrated preamp for phantom powering . [. . . ] Please take care that the pop shield is completely dry when it is replaced. The ear-pads can wear out due to effects of skin moisture, cosmetics and mechanical strains while wearing the headphones. From time to time you will need to replace the ear-pads: 80 / 250 Nominal sound pressure ^ level at1 kHz . [. . . ]