Marcinkiewicz 304 vs Marcinkiewicz 306
Both mouthpieces share similar core dimensions — the differences are in the details.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Marcinkiewicz 304
• Cornet
Backbore—
vs
Mouthpiece B
Marcinkiewicz 306
• 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.