Eleven-string alto guitar

In the United States, luthier Walter Stanul makes performance instruments ranging from 11 to 13-strings called the Archguitar.

[3] Georg Bolin first constructed 11-string alto guitar with collaboration with Swedish guitarist Per-Olof Johnson in the 1960s.

Johnson is the teacher of a well-known guitarist Göran Söllscher who made this instrument famous through his extensive usage of Bolin's 11-string alto guitar.

[6] Current luthiers who build 11-string alto guitars, primarily located in Sweden, include Heikki Rousu and Roger Strömberg.

[8] Based in Paris, Liberto Planas is considered as one of the leading experts of the 11-string guitar with more than 90 instruments with his signature.