SOLD: Upton Bass Karr Model, 2022


NEW Karr Model double bass, hybrid, fixed-neck. And it’s available! Call to customize: +1 (860) 535-9399.


New year, new Karr – you can take this one home! Loving the varnish on this svelte Karr model fixed-neck hybrid. Available to audition and purchase at the shop. Strung with Evah Pirazzis. We can still customize finishing items if you need a pickup, rib bumpers, dot markers or C-Extension.

Upton Bass String Instrument Co. specializes in building award-winning custom double basses and offers accessories for the double bass. Upton Bass also services all instruments and bows of the violin family with world-class restoration and repair, to view our online restoration portfolio visit

Upton Bass is ready to offer advice and answer any questions regarding this Karr Model double bass or related bass topics. Please contact UB at or call the shop at +1 (860) 535-9399. Hours of operation Tuesday through Saturday 10 am – 6 pm. The Workshop (The Barn) and showroom are located in Mystic, Connecticut conveniently between Boston and NYC.



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