Conn Precision 1 vs Giardinelli 7B
The Conn Precision 1 has a wider cup diameter, the Conn Precision 1 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Conn Precision 1
• Cornet
GeneralCup diameter16.56 mm / 0.6520 in
Best suited for
All-around players; comfortable wide rim
Full round tone; suited to low notes
vs
Mouthpiece B
Giardinelli 7B
• Cornet
Cup diameter16.50 mm / 0.6496 in
Cup Diameter
The Conn Precision 1 has a cup diameter of 16.56 mm / 0.6520 in compared to 16.50 mm / 0.6496 in on the Giardinelli 7B — a difference of 0.06 mm / 0.0024 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.