Which has a bigger cup — Bach 8½A or Bach 8¾C?

Both mouthpieces have virtually identical cup diameters at 16.10 mm / 0.6339 in.

How does cup depth compare between Bach 8½A and Bach 8¾C?

The Bach 8½A has a very deep cup while the Bach 8¾C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 8½A vs Bach 8¾C

Name: Bach 8¾C
Brand: Bach

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

Bach 8¾C

• Cornet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Throat Diameter

Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.

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.