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Instructions for Use
Changing Frequencies Using the
Tunable Diaphragm
Your Littmann Master Classic II Stethoscope is
equipped with a patented tunable diaphragm that
enables you to listen to both low and high frequency
sounds without turning over the chestpiece.
To listen to low and high frequency sounds without
removing and repositioning the chestpiece simply
alternate between light and firm pressure on the
chestpiece.
Headset Adjustment
Your new Littmann stethoscope
is designed to provide a
comfortable, acoustically sealed
ear fit. Notice that the eartubes
are set to accommodate the
typical anatomy of the ear canal.
Correct
The eartips should point in a
forward direction as you insert
them into your ear canals.
Incorrect
Low frequencies: To listen
to low frequency sounds
(traditional bell mode) use
very light skin contact.
High frequencies: To listen
to higher frequency
sounds (traditional
diaphragm mode), press
firmly on the chestpiece.
eartube. The eartips are pushed on to the end of the
eartube and snapped firmly into place. To remove, pull
firmly on the eartip.
Removing the Diaphragm and
Cleaning the Chestpiece
clean the parts in soapy water or wipe with alcohol.
Chestpiece surfaces can be wiped with alcohol or soapy
2
To reduce spring tension in
the headset, hold each eartube
at the bend near the eartip and
gradually pull apart until fully
extended.
To increase spring tension,
grasp the headset with one
hand where the eartubes enter
the tubing and squeeze until
the tubing on one eartube
touches the other. Repeat as
necessary.
For maximum acoustic
performance, comfortable
patented 3M™ Littmann®
Soft-sealing Eartips are
provided with your
stethoscope. This stethoscope
utilizes a unique design for
attaching the eartip to the
With the diaphragm side up,
grasp the rim with the
thumbs and index fingers of
both hands and roll the rim
off the edge of the
chestpiece. Remove the
diaphragm from the rim and
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