Electroacoustic guitar from the FSX series with Concert Cutaway body type. A new FG has louder and stronger sound in the low- to mid-ranges, thanks to cutting-edge acoustic analysis technology developed by the Yamaha R&D Division. Yamaha's engineers have achieved this sound by utilizing analysis and simulation to arrive at the best bracing design without depending on tradition or guesswork. System 66 feature an under-saddle piezo pickup developed by Yamaha. Controls include a 3-band EQ, an adjustable mid-range frequency control, and a precision chromatic tuner for optimum sound tailoring.- Body Top: Solid Spruce - Body Back and Sides: Mahogany - Neck: Nato - Scale: 634 mm - Fretboard: Rosewood - Number of Frets: 20 - Neck radius: 400 mm - Rosewood bridge - Nut width: 43 mm - Electronics: SYSTEM66 + SRT Pickup - Finish: Natural.