Bach 1 vs Schilke 15A4A
The Bach 1 has a wider cup diameter, the Bach 1 features a deeper cup.
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
Bach 1
• Trumpet
Backbore—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Schilke 15A4A
• Trumpet
Backbore27
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.