Bob Reeves 41/S/s vs Conn Imp. Precision 6
The Conn Imp. Precision 6 has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 41/S/s
• Cornet
Cup diameter16.27 mm / 0.6406 in
vs
Mouthpiece B
Conn Imp. Precision 6
• Cornet
LeadCup diameter16.41 mm / 0.6461 in
Best suited for
Professional players
Professional lead; small throat; narrow rim
Cup Diameter
The Conn Imp. Precision 6 has a cup diameter of 16.41 mm / 0.6461 in compared to 16.27 mm / 0.6406 in on the Bob Reeves 41/S/s — a difference of 0.14 mm / 0.0055 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.