Which has a bigger cup — Bach 1B or Conn Precision 6?

The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 16.41 mm / 0.6461 in on the Conn Precision 6 — a difference of 0.59 mm / 0.0232 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1B and Conn Precision 6?

The Bach 1B has a deep 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 1B vs Conn Precision 6

Name: Conn Precision 6
Brand: Conn

The Bach 1B has a wider cup diameter, the Bach 1B 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 1B

• Cornet

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

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 1B details Conn Precision 6 details Bach 1B equivalents Conn Precision 6 equivalents

Bach 1B vs Conn Precision 6

Playing Characteristics

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