The Optimus STA-300 is a receiver in the solid state amplifier category. It was manufactured from 1991 to unknown.
Josh (November 26, 2012): it as intermitent sound on right channel, speaker wiring is ok
Steve Anctil (December 13, 2016): If anyone is interested, I have .047F 5.5V supercapacitors used as memory back-up for the STA-300. It is C-167 in this unit.
I'm still looking for a schematic for this unit.
Forum topics on the Optimus STA-300
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