Conn Precision 1 vs Conn Precision 2
The Conn Precision 1 has a wider cup diameter.
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
Conn Precision 2
• Cornet
GeneralCup diameter16.41 mm / 0.6461 in
Best suited for
Players wanting plenty of volume; medium rim
Full volume; big tone
Cup Diameter
The Conn Precision 1 has a cup diameter of 16.56 mm / 0.6520 in compared to 16.41 mm / 0.6461 in on the Conn Precision 2 — a difference of 0.15 mm / 0.0059 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Which is better?
Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.