Detail 01
System 66 electronics
The onboard preamp provides bass, middle, and treble controls plus a selectable mid-frequency setting.

Independent shopping perspective
The Ruby Red FSX800C is a right-handed concert-body acoustic-electric built around a single cutaway, an under-saddle piezo pickup, and Yamaha’s System 66 preamp. For amplified work, controls for bass, middle, and treble combine with a selectable mid frequency, so adjustments stay at the guitar. An onboard tuner supports quick tuning checks. Its solid Sitka spruce top with nato back and sides is described as clear and balanced with rich overtones; the body is slimmer than the FG series and carries 20 frets.


Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
The onboard preamp provides bass, middle, and treble controls plus a selectable mid-frequency setting.
Detail 02
It supplies the guitar’s amplified signal through the System 66 preamp.
Detail 03
The cutaway provides access to the higher frets.
Detail 04
The onboard preamp runs on AA batteries.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
Yes. The System 66 preamp has bass, middle, and treble controls, plus a selectable mid-frequency setting.
Yes. An onboard tuner is part of the electronics.
It is listed in Red with a gloss body finish.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.