Schilke 47 vs Yamaha SL-47L
the Schilke 47 has a larger throat opening.
Mouthpiece A
Schilke 47
• Trombone
Cup diameter24.99 mm / 0.9839 in
Cup depthMedium
Rim width—
Throat diameter5.95 mm / 0.2343 in
Backbore15/64 .2344"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha SL-47L
• Trombone
Cup diameter24.98 mm / 0.9835 in
Cup depthMedium
Rim width—
Throat diameter5.85 mm / 0.2303 in
BackboreStandard
Finish—
Material—
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.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Schilke 47 has a wider throat (5.95 mm / 0.2343 in vs 5.85 mm / 0.2303 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.