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 narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 8½A

• Cornet

Throat diameter3.66 mm / 0.1441 in

Mouthpiece B

Conn Imp. Precision 5

• Cornet

Lead

Throat 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.