Sennheiser HDI 302 Instructions For Use Manual page 41

SPECIAL ADJUSTMENT POSSIBILITIES ON THE
RI 250, RI 250-J AND RI 500 STETHOSET RECEIVERS:
ADJUSTING THE BASS ATTENUATION
You can use the two supplied sealing tapes to seal the small holes in the
headphone systems. The more holes you seal with the sealing tapes, the greater
the bass attenuation. This increases the intelligibility without increasing the
volume - which is an advantage for persons with a slight hearing impairment.
ADJUSTMENT FOR HEARING IMPAIRMENT
Is your hearing capacity different for each ear? You can use the balance control
to adjust your RI 250 (all variants) or RI 500 stethoset receiver to your
individual needs.
The balance control is recessed and is adjusted with a small screwdriver. This
adjustment is only changed occasionally - and it is best done by the hearing aid
dealer who sold you your stethoset receiver.
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