Which has a bigger cup — Schilke 42 or Yamaha SL-48S-GP?

The Yamaha SL-48S-GP has a cup diameter of 25.25 mm / 0.9941 in compared to 23.22 mm / 0.9142 in on the Schilke 42 — a difference of 2.03 mm / 0.0799 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Schilke 42 and Yamaha SL-48S-GP?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Schilke 42 vs Yamaha SL-48S-GP

Name: Yamaha SL-48S-GP
Brand: Yamaha

The Yamaha SL-48S-GP has a wider cup diameter, the Yamaha SL-48S-GP has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Schilke 42

• Trombone

Backbore15/64 .2344"

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha SL-48S-GP

• Trombone

BackboreSemi-wide

Best suited for

📣High-volume projection — open throat for power

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.

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Schilke 42 vs Yamaha SL-48S-GP

Playing Characteristics

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What Changes If You Switch?

Which is better?

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