Which has a bigger cup — Conn Precision 4 or Kelly 7C-BUGLE?

The Kelly 7C-BUGLE has a cup diameter of 16.51 mm / 0.6500 in compared to 16.41 mm / 0.6461 in on the Conn Precision 4 — 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 Precision 4 and Kelly 7C-BUGLE?

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

Conn Precision 4 vs Kelly 7C-BUGLE

Name: Kelly 7C-BUGLE
Brand: Kelly

The Kelly 7C-BUGLE 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 Precision 4

• Trumpet

General

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Players with large lips; close to Bach 2C/Schilke 16C4

🎶Bright tone; same as Model 3 with wide rim

Mouthpiece B

Kelly 7C-BUGLE

• Trumpet

General

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Standard bugle use

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 Precision 4 vs Kelly 7C-BUGLE

Playing Characteristics

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