User manual BEYERDYNAMIC DT 150

[. . . ] 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 sheet to give you an idea of the design criterion and some information on connection, use and maintenance. DT 150 The DT 150 is a closed dynamic studio headphone and it is configured for use in broadcasting, film and recording studios. [. . . ] It is important that the external equipment they 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 headphone is 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. Convention states that with the DT 190 the boom is placed over the left ear and the earphones of the DT 190 are identified: L and R (left and right). The microphone can be used from the right ear, but if true L and R status should be maintained, or split feeds are in operation, it may be necessary to make a custom lead with the headphone connections reversed. The L&R nomenclature plates of the DT 190 can also be swapped to reflect these changes. 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 the breath stream, therefore minimising any `pop' sounds. Of course every user will be different and a degree of experimentation will be necessary to achieve the preferred result. Professional users should note that it is recommended practise that headsets are issued on an individual user basis to preclude any possible health risks. As with any equipment which will be used in close proximity to sensitive parts of the body, it is essential that the ear pads, the headband and the microphone pop-shield are kept clean. Use a damp cloth for cleaning the ear-pads and headband using only gentle cleansing agents (such as washingup liquid). Take care not to allow any water drops into the transducer elements and do not use any solvent cleaners. [. . . ] 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 lawyers!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. [. . . ]