Acoustic guitars with 20 frets

electroacoustic, 4/4, dreadnought (western), strings 6, pickup, equalizer, tuner, deck: spruce, bridge - rosewood, neck: mahogany, overlay - rosewood, 20 frets(s)

acoustic, 4/4, grand auditorium, strings 6, deck: spruce, bridge - ebony, neck: mahogany, overlay - ebony, 21 frets(s)