Limiter - Ltd Versions; Maintenance; Models - Beyerdynamic DT 250 Mode D'emploi

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5. Limiter - LTD Versions

Headphones 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 head-
band 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 headsets 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
DT 250
DT 252
DT 280 MK II
DT 280 MK II
DT 290 MK II
DT 290 MK II
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
Studio headphone, 250 Ω, black, with
WK 250.07 coiled cable, plug-in type
(stereo mini jack plug with 1/4" adapter) . . Order # 443.530
Single-ear studio headphone, 80 Ω,
black, with WK 250.07 coiled cable,
plug-in type (stereo mini jack plug
with 1/4" adapter) . . . . . . . . . . . . . . . . . . Order # 445.177
Single-ear headset, 200/80 Ω. . . . . . . . . . Order # 701.599
Single-ear headset, 200/250 Ω. . . . . . . . . Order # 701.602
Headset, 200/80 Ω . . . . . . . . . . . . . . . . . Order # 701.610
Headset, 200/250 Ω . . . . . . . . . . . . . . . . Order # 701.629
DT 25x / DT 28x / DT 29x