Which has a bigger cup — Conn Imp. Precision 3 or Kelly 7C?

The Kelly 7C has a cup diameter of 16.51 mm / 0.6500 in compared to 16.41 mm / 0.6461 in on the Conn Imp. Precision 3 — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Conn Imp. Precision 3 and Kelly 7C?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Conn Imp. Precision 3 vs Kelly 7C

Name: Kelly 7C
Brand: Kelly

The Kelly 7C has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Conn Imp. Precision 3

• Cornet

General

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Most popular model; all-around

🎶Bright quality of tone in all registers

Mouthpiece B

Kelly 7C

• Cornet

General

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Beginner / intermediate

Which is better?

Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.

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Conn Imp. Precision 3 vs Kelly 7C

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Conn Imp. Precision 3 with others

Compare Kelly 7C with others

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