Bob Reeves 43.5/FE vs Giardinelli 17FL
The Bob Reeves 43.5/FE has a wider cup diameter, the Giardinelli 17FL features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 43.5/FE
• Flugelhorn
Cup diameter17.26 mm / 0.6795 in
vs
Mouthpiece B
Giardinelli 17FL
• Flugelhorn
Cup diameter15.00 mm / 0.5906 in
Cup Diameter
The Bob Reeves 43.5/FE has a cup diameter of 17.26 mm / 0.6795 in compared to 15.00 mm / 0.5906 in on the Giardinelli 17FL — a difference of 2.26 mm / 0.0890 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.