All theorboes can be made with single strings on the fingerboard, as seems to be the modern fashion, but pegs and holes in the nut can be made to allow double stringing later. For double stringing, + 160€.
After Buechenberg (1614). The foldable neck can be built on all theorbos and archlutes. Pictured here with an ebony veneer and border inlays. The only part of the mechanism that remains visible in playing condition is the hinge. A threaded metal rod, disguised as a tuning peg, holds everything in place, and when folded, the strings wrap around a holder so that they do not need to be loosened for storage or transport.
Pitch: a or g, String length: 88 & 174 cm (or any string lengths - no need to be afraid of those super long extensions anymore!)
Usually theorbos have triple rosettes, but the original Schelle has a large single inset rosette. I chose to use the same design, but cut in the soundboard, as the large majority of lute rosettes were made. The Schelle is also unlike most theorbos in that the body is made of only 11 wide ribs, while usually there are closer to 30 of them. The original also has a hinge on the extension, allowing the instrument to be folded for transportation if the diapasons are loosened. This theorbo suits tuning in A or D-minor, even G with slightly thicker strings than optimal.
Pitch: d String length: 86 and 161 cm
The Harz started life as a theorbo but the neck was shortened at some point. It can be made with a wide variety of string lengths to suit the player. Shown here with a reduced number of ribs, a neck long enough for 11 frets and pegs for single string courses.
Pitch: a, String length: 78 & 135 cm
String lengths around 67cm & 144cm, 1+6x2 + 7x1. Renaissance tuning with a long extension and single bass courses (For example Martinus Harz 1665). The archlute differs from the theorbo in that it does not have re-entrant tuning, so you can play from all renaissance lute tablature. The repertoire for this type of lute greatly benefits from having ten frets on the neck.
3% reduced size with less ribs in the bowl, giving a comfortably sized instrument in g' (a=415Hz). Can also be made with a longer neck for tuning in f or e.
Pitch: f# String length: 67 & 144 cm
String lengths around ~59cm & 93cm, 1+6x2 + 7x2. An instrument similar to the German swan neck baroque lute in having a short extension on which are diapasons with octave strings. The tuning of this instrument is the same as a renaissance lute, but with the added bass courses.