Bruno Tilz 306-5 GS vs Marcinkiewicz ET3C. Loper
The Bruno Tilz 306-5 GS has a wider cup diameter, the Marcinkiewicz ET3C. Loper features a deeper cup, the Bruno Tilz 306-5 GS has a larger throat opening.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bruno Tilz 306-5 GS
• Trombone
CatalogBackbore—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz ET3C. Loper
• Trombone
Backbore—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
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.