Which has a bigger cup — Schilke 51D or Yamaha SL-48L-GP?

The Schilke 51D has a cup diameter of 25.55 mm / 1.0059 in compared to 25.25 mm / 0.9941 in on the Yamaha SL-48L-GP — a difference of 0.30 mm / 0.0118 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Schilke 51D and Yamaha SL-48L-GP?

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

Schilke 51D vs Yamaha SL-48L-GP

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

The Schilke 51D has a wider cup diameter, the Schilke 51D 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 51D

• Trombone

BackboreJ .277"

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha SL-48L-GP

• Trombone

BackboreSemi-narrow

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 51D vs Yamaha SL-48L-GP

Playing Characteristics

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