Schilke 13A4a vs Yamaha TR-14B4-GP
The Yamaha TR-14B4-GP has a wider cup diameter, the Schilke 13A4a has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Schilke 13A4a
• Trumpet
Throat diameter3.66 mm / 0.1441 in
vs
Mouthpiece B
Yamaha TR-14B4-GP
• Trumpet
Throat diameter3.65 mm / 0.1437 in
Throat Diameter
The Schilke 13A4a has a wider throat (3.66 mm / 0.1441 in vs 3.65 mm / 0.1437 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.