Bach 7D vs Bach 8¾C
The Bach 7D has a wider cup diameter.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Bach 7D
• Cornet
Cup depthShallow
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Bach 8¾C
• Cornet
Cup depthShallow
Best suited for
Lead / commercial — shallow cup for brightness and range
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
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.