K2S4800 (serv.man2) - JBL Audio User Guide / Operation Manual. Page 15

The S4800 loudspeaker system is
sprayed in a polyurethane finish
and requires no maintenance other
than an occasional dusting with a
soft, dry, lint-free cotton cloth.

The horns may also be wiped with
a soft cloth. Treat the surface very
carefully to avoid scratching the
finish. To remove fingerprints and
smudges, apply a small amount of
ammonia-free window cleaner to
the cloth and gently clean the 
surface.

Never use any abrasive cleaners or
chemicals to clean the enclosure. If
the enclosure becomes perceptibly
scratched or otherwise damaged,
consult a qualified furniture repair
shop.

The grilles should never be washed
in water, which might cause
discoloration or sagging. The grilles
may be cleaned using a vacuum
cleaner with the suction set
extremely low.

To clean the woofer surfaces, use a
soft, dry paintbrush to carefully
sweep the dust away. 

Never use a

damp cloth.

All wiring connections should be
inspected and cleaned, or remade
periodically. The frequency of 
the maintenance depends on the
metals involved in the connections,
atmospheric conditions and other
factors. 
Consult a JBL specialist dealer for
specific recommendations.

15