Editing Twelve-string guitar (section)

{{Short description|Fretted string instrument optimized for richer sounds}}
{{About|guitars with six courses|guitars with more than six separate strings|Classical guitar with additional strings}}
{{Use dmy dates|date=May 2020}}
[[File:Roland Oetter 12string.jpg|thumb|An acoustic 12-string guitar hand-crafted in 1977]]
A '''twelve-string guitar''' (or '''12-string guitar''') is a steel-string [[guitar]] with 12 [[string (music)|strings]] in six [[Course (music)|courses]], which produces a thicker, more ringing tone than a standard six-string guitar. Typically, the strings of the lower four courses are tuned in octaves, with those of the upper two courses tuned in unison. The gap between the strings within each dual-string course is narrow, and the strings of each course are fretted and plucked as a single unit. The neck is wider, to accommodate the extra strings, and is similar to the width of a [[classical guitar]] neck. The sound, particularly on acoustic instruments, is fuller and more harmonically resonant than six-string instruments. The 12-string guitar can be played like a 6-string guitar as players still use the same notes, chords and guitar techniques like a standard 6-string guitar, but advanced techniques can be challenging as players need to play or pluck two strings simultaneously.

Structurally, 12-string guitars, especially those built before 1970, differ from six-string guitars in the following ways:
*The headstock is elongated to accommodate 12 tuning machines.
*The added tension of the six additional strings necessitates stronger reinforcement of the neck.
*The body is also reinforced, and built with a stronger structure, to withstand the higher tension.
*The fretting scale is generally shorter to reduce the overall string tension.

Twelve-string guitars are made in both [[acoustic guitar|acoustic]] and [[electric guitar|electric]] forms. However, the acoustic type is more common.