Schilke 45 vs Yamaha SL-53L
The Yamaha SL-53L has a wider cup diameter, the Yamaha SL-53L has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Schilke 45
• Trombone
Cup diameter24.38 mm / 0.9598 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha SL-53L
• Trombone
Cup diameter25.91 mm / 1.0201 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha SL-53L has a cup diameter of 25.91 mm / 1.0201 in compared to 24.38 mm / 0.9598 in on the Schilke 45 — a difference of 1.53 mm / 0.0602 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.