NEC DT 150, DT 190 manual Maintenance, Safety

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.

Maintenance

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 washing- up liquid). Take care not to allow any water drops into the transducer elements and do not use any solvent cleaners.

The microphone pop-shield of the headset can be easily removed and washed in warm water. Please take care that the pop-shield is completely dry when it is replaced.

The fully modular design of the DT 150 and DT 190 allows for full, in-field serviceability without the need for specialists tools. Every item of the assembly is available as a spare part and no special training is necessary for servicing. The Order Numbers of all of the spare parts are listed under “Spares“, “Supplied Accessories“ and “Optional Accessories“. Please take care to identify the parts required by the Order Number as there are many options, especially for the transducer parts and the cable assemblies.

Safety

When plugging in headphones or 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 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.

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