Which has a bigger cup — Bach 2½C or Conn Precision 6?

The Conn Precision 6 has a cup diameter of 16.41 mm / 0.6461 in compared to 16.40 mm / 0.6457 in on the Bach 2½C — a difference of 0.01 mm / 0.0004 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 2½C and Conn Precision 6?

The Bach 2½C has a medium cup while the Conn Precision 6 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 2½C vs Conn Precision 6

Name: Conn Precision 6
Brand: Conn

The Conn Precision 6 has a wider cup diameter, the Bach 2½C features a deeper cup.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 2½C

• Cornet

Backbore—

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

Conn Precision 6

• Cornet

Lead

Backbore—

Best suited for

📋Professional lead players

🎶Recommended for professionals; small throat

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.

Open in interactive tool + Add third mouthpiece Bach 2½C details Conn Precision 6 details Bach 2½C equivalents Conn Precision 6 equivalents

Bach 2½C vs Conn Precision 6

Playing Characteristics

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