Bob Reeves 42/C/X vs Schilke 13B
The Schilke 13B has a wider cup diameter.
Mouthpiece A
Bob Reeves 42/C/X
• Trumpet
Cup diameter16.67 mm
Cup depthDeep
Rim width—
Throat diameter—
BackboreX
Finish—
Material—
vs
Mouthpiece B
Schilke 13B
• Trumpet
Cup diameter16.77 mm
Cup depthDeep
Rim width—
Throat diameter3.65 mm
Backbore26
Finish—
Material—
Cup Diameter
The Schilke 13B has a cup diameter of 16.77 mm compared to 16.67 mm on the Bob Reeves 42/C/X — a difference of +0.10 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.