Bach 6BM vs Bach 8B
the Bach 6BM has a larger throat opening.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 6BM
• Cornet
Backbore—
vs
Mouthpiece B
Bach 8B
• Cornet
Backbore—
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.