In a small guitar amp. A 16 pin SMD IC with no heatsinking and drives a 4 ohm speaker of about 8 watts probably.
Markings,
TI logo
200001 67K CC8CNothing found on TI or my usual datasheet sites on those 3 numbers or concatenating pairs
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on