Shires GBA 1½G Extra Deep
TromboneIn Production
Precision Specifications
RIM DIAMETER—
CUP DEPTH42.29 mm
THROAT ∅7.49 mm
BACKBORE—
SHANKlarge
CUP SHAPE—
Rim Width—
Rim Contour—
Throat Drill #—
Material—
Finish—
Weight—
Recommended For
OrchestralClassical
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Special Features
- GBA Series
- Bass Trombone
- Extra Deep
Reference Notes
Shires GBA 1½G Extra Deep appears in the Trombone catalog section with 42.29 mm cup depth, 7.49 mm throat, and large shank. Database tags list it for Orchestral and Classical use. Noted features include GBA Series, Bass Trombone, and Extra Deep. Use these measurements as a comparison starting point: fit and response still depend on the player, dental structure, instrument receiver, and each manufacturer's measuring method.