Bach 7D vs Bach 7DW
Both mouthpieces share similar core dimensions — the differences are in the details.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 7D
• Cornet
Cup diameter16.20 mm / 0.6378 in
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Bach 7DW
• Cornet
Cup diameter16.20 mm / 0.6378 in
Best suited for
Lead / commercial — shallow cup for brightness and range
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.20 mm / 0.6378 in.
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.