Bob Reeves RP4 vs Curry 3 C.
The Curry 3 C. has a wider cup diameter, the Curry 3 C. features a deeper cup.
Mouthpiece A
Bob Reeves RP4
• Trumpet
Cup diameter16.27 mm / 0.6406 in
Cup depthShallow
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
vs
Mouthpiece B
Curry 3 C.
• Trumpet
Cup diameter16.89 mm / 0.6650 in
Cup depthMedium
Rim width—
Throat diameter3.70 mm / 0.1455 in
Backbore—
Finish—
Material—
Cup Diameter
The Curry 3 C. has a cup diameter of 16.89 mm / 0.6650 in compared to 16.27 mm / 0.6406 in on the Bob Reeves RP4 — a difference of 0.62 mm / 0.0244 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Curry 3 C. has a medium cup while the Bob Reeves RP4 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.