How does cup depth compare between Bach 8½A and Conn Imp. Precision 5?

The Bach 8½A has a very deep cup while the Conn Imp. Precision 5 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 8½A vs Conn Imp. Precision 5

Name: Conn Imp. Precision 5
Brand: Conn

the Bach 8½A features a deeper cup.

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

The internal diameter of the cup, measured at the widest point inside the rim.

Mouthpiece A

Bach 8½A

• Cornet

Cup diameter16.10 mm / 0.6339 in

Mouthpiece B

Conn Imp. Precision 5

• Cornet

Lead

Cup diameter—

Best suited for

📋Dance band / lead; standard on Conn 6B Victor

🎶Bright tone; excellent in high register

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.