Bob Reeves 43N/F vs Schilke 20F
The Schilke 20F has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 43N/F
• Flugelhorn
Cup diameter17.07 mm / 0.6720 in
vs
Mouthpiece B
Schilke 20F
• Flugelhorn
Cup diameter17.78 mm / 0.7000 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Schilke 20F has a cup diameter of 17.78 mm / 0.7000 in compared to 17.07 mm / 0.6720 in on the Bob Reeves 43N/F — a difference of 0.71 mm / 0.0280 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.