Limiter - Ltd Versions; Maintenance; Models - Beyerdynamic DT 250 Bedienungsanleitung

V.11-Version of DT 287/297:
Adjustment of the built-in microphone
pre-amplifier.

5. Limiter - LTD Versions

All headphone and headsets of the DT 200 series can also be ordered with an
integrated limiter. This option ensures that the hearing of the user is protected
at any time while using the product. In order to meet the important health and
safety criteria the passive circuitry has been designed to achieve a similar sound
impression as a complex VCA limiter. It is a two-phase limiting concept which
incorporates a smooth decrease of the audio signal by 6 dB after which a hard,
protective brick-wall limiter limits the audio signal when the input volume is still
increased.
The advantage of this concept is the soft, compressor-like transition between
the unlimited audio signal and the brick-wall limiter. This area still sounds very
good, but signalises the user without producing immediate distortion that the
limiter threshold is reached. The headphones and headsets include the addition
"LTD" and can be found in chapter 7. "Models". All models can be ordered
with any preferred limiter threshold.
6.

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 head-
sets can be easily removed and washed in warm water. 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:
1. Remove the ear-pad from the housing part.
2. Put the new ear-pad on the housing so that
the drop-in pins can lock in the corresponding holes.
3. Press the new ear-pad with the thumbs of both hands
to the housing until you hear a clear "click" noise.
The modular design of the headphone allows easy servicing as all part can
easily be exchanged.

7. Models

DT 250
18
Studio headphone, 80 Ω, black, with
WK 250.07 coiled cable, plug-in type
(stereo mini jack plug with 1/4" adapter). . Order # 442.844
L