Description

The Jeff Jewitt OM-12SB – Engelmann Spruce & Torrefied Maple is a stunningly crafted 12-fret orchestra model that showcases the vision and mastery of one of the guitar world’s most respected artisans. Jeff Jewitt’s legacy as a trailblazer in guitar finishing and color science has profoundly shaped the modern craft of luthiery. His deep-rooted expertise in materials and tonal architecture, combined with decades of building experience, is evident in every contour and chord of this beautifully expressive instrument.

At the heart of this OM lies a sonically graded and meticulously tuned AAAA Engelmann spruce top, delivering a smooth, open voice with remarkable clarity and responsiveness. Paired with torrefied flame maple mahogany back and (triple laminate) sides, the guitar achieves a tone that is both brilliant and warm, projecting with articulate presence and extraordinary dynamic range. Designed with the player in mind, the OM-12SB features an Ebano arm bevel and comfort wedge for extended playability, wrapped in elegant black/white/black purfling and bound in striking Ebano.

Visual artistry and precision collide in details like the segmented dyed birch rosette and matching end wedge—both stabilized and accented with black/maple/black purfling. The ebony backstrip, with delicate maple lines and a bold blue block inlay, brings a modern flair to its timeless body. The shaded semi-gloss Honduran mahogany neck—shaped in a modern fingerstyle C—invites intricate playing with effortless grace, while the deep black top finish under a catalyzed urethane gloss adds dramatic contrast and sophistication.

Jeff’s choice of Ziricote for the fingerboard and bridge adds tonal complexity and visual allure, complemented by EVO gold frets and Macassar ebony headstock veneers. The guitar’s precision-engineered 5/32” compensated bone saddle and stainless steel dual-action truss rod (reinforced with carbon fiber) ensure perfect setup stability and intonation. Gotoh 510 1:21 Cosmo tuners complete the build with smooth, ultra-precise tuning.

With a scale length of 24.9", a 16” fingerboard radius, and a resonance profile of 162hz (top), 216hz (back), and a Helmholtz frequency of 92hz, the OM-12SB is a featherweight powerhouse of tone at the highest level of refinement. More than just a guitar, it’s a testament to Jeff Jewitt’s lifelong pursuit of tone, beauty, and performance—crafted for players who demand both sonic excellence and aesthetic brilliance.

Other specifications include:

OM Body – 12 Fret
AAAA Engelmann Spruce Top - Sonically Graded & Tuned @ Jewitt Guitars
Torrefied Flame Maple Mahogany Back & Sides - Triple Laminated Sides
Ebano Body Binding with Arm Bevel & Comfort Wedge
Black/White/Black Purflings
Segmented Birch Rosette - Dyed Stabilized With Blk/Maple/Blk Purfling
Segmented Birch End Wedge - Dyed Stabilized With Blk/Maple/Blk Purfling
Ebony Backstrip with Maple Lines & Blue Block Inlay
Ebony Heel Cap
Modern Fingerstyle C Shape Honduran Mahogany Neck - Shaded & Semi-Gloss Black Finish
Ziricote Fingerboard
Ziricote Bridge
EVO Gold Frets
Macassar Ebony Headstock Front Veneer with White Purfling
Macassar Ebony Headstock Back Veneer
5/32” Compensated Bone Saddle
Bone Nut
Ebony Bridge Pins
Stainless Steel Dual Action Truss Rod with Dual Carbon Fiber Rod Reinforced
16” Fingerboard Radius
Gotoh 510 Cosmo 1:21 Tuning Machines
Catalyzed Urethane Gloss Finish - Black Top
Animal Protein Glue on Top Braces
Cross Rock Ultralight Fiberglass Case
1 3/4″ Nut Width
2 1/4″ Bridge Spacing
24.9″ Scale Length
Top Frequency - 162hz
Back Frequency - 216hz
Helmholtz (Body Cavity Resonance) - 92hz
4 lb 10 oz