Conn Connstellation 7CW vs Conn Precision 1
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 Connstellation 7CW
• Cornet
GeneralCup diameter16.42 mm / 0.6465 in
Best suited for
Trumpet players seeking precise matched dimensions
Size 7 (16.42mm); larger cup; fuller lower register; Wide rim; larger rounded inner radius; less bit
vs
Mouthpiece B
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
Cup Diameter
The Conn Precision 1 has a cup diameter of 16.56 mm / 0.6520 in compared to 16.42 mm / 0.6465 in on the Conn Connstellation 7CW — 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?
Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.