Schilke 47 vs Yamaha SL-47L
the Schilke 47 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Schilke 47
• Trombone
Cup diameter24.99 mm / 0.9839 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha SL-47L
• Trombone
Cup diameter24.98 mm / 0.9835 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 24.99 mm / 0.9839 in.
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.