Don Robertson developed the modern design for the Low C-Chromatic Double-Bass Extension in the early 1980's.  Our latest version of the Robertson Extension, further refined by luthier, Evan Davenport, now has fully adjustable intonation.  Robertson Extensions are entirely custom-made to each individual instrument and are used by the most discriminating bass players around the world.

 

Call our office at any time and ask to speak to our bass specialist. 505.889.2999