Bob Reeves 41/D/69 vs Yamaha TR-14B4
The Yamaha TR-14B4 has a wider cup diameter, the Bob Reeves 41/D/69 features a deeper cup.
Mouthpiece A
Bob Reeves 41/D/69
• Trumpet
Cup diameter16.27 mm / 0.6406 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore69
Finish—
Material—
vs
Mouthpiece B
Yamaha TR-14B4
• Trumpet
Cup diameter16.85 mm / 0.6634 in
Cup depthShallow
Rim width—
Throat diameter3.65 mm / 0.1437 in
BackboreSemi-narrow
Finish—
Material—
Cup Diameter
The Yamaha TR-14B4 has a cup diameter of 16.85 mm / 0.6634 in compared to 16.27 mm / 0.6406 in on the Bob Reeves 41/D/69 — a difference of 0.58 mm / 0.0228 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bob Reeves 41/D/69 has a deep cup while the Yamaha TR-14B4 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.