Bob Reeves 42/B/2 vs Giardinelli 7B
The Bob Reeves 42/B/2 has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 42/B/2
• Cornet
Cup diameter16.67 mm / 0.6563 in
vs
Mouthpiece B
Giardinelli 7B
• Cornet
Cup diameter16.50 mm / 0.6496 in
Cup Diameter
The Bob Reeves 42/B/2 has a cup diameter of 16.67 mm / 0.6563 in compared to 16.50 mm / 0.6496 in on the Giardinelli 7B — a difference of 0.17 mm / 0.0067 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.