Schilke 58 vs Yamaha BL-60L
The Yamaha BL-60L has a wider cup diameter, the Yamaha BL-60L has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Schilke 58
• Trombone
Cup diameter27.68 mm / 1.0898 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha BL-60L
• Trombone
Cup diameter28.25 mm / 1.1122 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha BL-60L has a cup diameter of 28.25 mm / 1.1122 in compared to 27.68 mm / 1.0898 in on the Schilke 58 — a difference of 0.57 mm / 0.0224 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.