Beyerdynamic DT 770 M Information De Produit page 6

Maintenance
As with any equipment which will be used in
close proximity to sensitive areas of the body, it is
essential that the ear-pads and head-band are kept
clean. Use a damp cloth for cleaning using warm
water only, taking care to ensure that no liquid
drops into the transducers or the volume control.
Should it become necessary to replace the ear-pads
or the head-band cushion, please refer to "Spares
and Accessories".
Safety
When plugging your headphones into an
amplifier, please make sure that the volume control
is set at minimum and is adjusted after they have
been put on. The very low levels of distortion
present within the DT 770 M mean that listening
levels are higher than is actually perceived and we
would like to warn you of this so that you are able
to enjoy these headphones for many years without
damage to your ears.
Spares and Accessories
Model Description . . . . . . . . . . . . . Order #
BN 59-53/A Headband Pad . . . . . . . . . . . 340.502
EDT 550 S Ear Pads, soft PVC. . . . . . . . . 407.119