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Loudspeaker grilles protect the transducers and enhance
the appearance of the system in many rooms. However,
even the most acoustically transparent grille affects the
sound. On the 250Ti Jubilee, the effect is minor, particular-
ly for casual listening or background music, but apparent.
For serious listening in circumstances where damage is
unlikely (i.e., when small children are not present), we
recommend that the grille be removed.
The 250Ti Jubilee is finished in high-gloss lacquer. The
beautiful, deep-gloss finish is the result of a meticulous
multistep painting and polishing procedure. Treat the sur-
face very carefully to avoid scratching the finish. Use only
lint-free cotton cloths for dusting. To remove fingerprints
and smudges, an ammonia-free window cleaner may be
used; apply a small amount to a lint-free cotton cloth and
gently clean the surface. Never use any abrasive cleaners
or strong chemicals to clean the enclosure. In case of
deep scratches or damage, please consult a qualified
furniture repair shop.
The grille may be gently vacuumed in the removed
position only. Stains may be removed with an aerosol
cleaner, following its instructions. Do not use solvents on
the grille.
JBL 250Ti Jubilee loudspeakers are designed to provide
years of trouble-free service. No maintenance is required.
If a problem is suspected, first make sure that all connec-
tions are properly made and clean. If a problem exists in
one loudspeaker, reverse the speaker wires to the left and
right system. If the problem remains in the same system,
then the fault is in the loudspeaker. If the problem appears
in the opposite system, the cause is in another component
or cable.
Do not move loudspeaker cones or diaphragms by
hand. The voice coil assembly is aligned with extreme
precision and the clearance is very small. Any attempt to
move the assembly by hand can easily force the coil out of
alignment and cause distortion or failure.
Should your 250Ti Jubilee system ever need service,
contact the JBL dealer or distributor from whom it was
purchased. If this is not possible, write directly to the JBL
Customer Service Department, describing the problem as
fully as possible, and wait for return authorization. Do not
return products to the JBL factory without prior authoriza-
tion. Address correspondence to: JBL Customer Service,
80 Crossways Park West, Woodbury, NY 11797
Telephone: (516) 496-3400, or (800) 645-7292. Outside
the United States, contact your local JBL distributor.
Grille
General Care
Service
7
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