Which has a bigger cup — Bach 10B or Bach 8B?

The Bach 8B has a cup diameter of 16.20 mm / 0.6378 in compared to 16.00 mm / 0.6299 in on the Bach 10B — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 10B and Bach 8B?

Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.

Bach 10B vs Bach 8B

Name: Bach 8B
Brand: Bach

The Bach 8B has a wider cup diameter.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 10B

• Cornet

Material—

Mouthpiece B

Bach 8B

• Cornet

Material—

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.