Bach 1¼C vs Schilke 13A4a
The Bach 1¼C has a wider cup diameter, the Bach 1¼C features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 1¼C
• Trumpet
Throat diameter3.66 mm / 0.1441 in
vs
Mouthpiece B
Schilke 13A4a
• Trumpet
Throat diameter3.66 mm / 0.1441 in
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
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.