Bob Reeves Piccolo 40/B/692 vs Yamaha TR-16C4
The Yamaha TR-16C4 has a wider cup diameter, the Bob Reeves Piccolo 40/B/692 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves Piccolo 40/B/692
• Trumpet
Cup diameter15.88 mm / 0.6252 in
vs
Mouthpiece B
Yamaha TR-16C4
• Trumpet
Cup diameter17.00 mm / 0.6693 in
Cup Diameter
The Yamaha TR-16C4 has a cup diameter of 17.00 mm / 0.6693 in compared to 15.88 mm / 0.6252 in on the Bob Reeves Piccolo 40/B/692 — a difference of 1.12 mm / 0.0441 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.