Which has a bigger cup — Denis Wick 4BL or Yamaha SL-48L-GP?

The Denis Wick 4BL has a cup diameter of 25.90 mm / 1.0197 in compared to 25.25 mm / 0.9941 in on the Yamaha SL-48L-GP — a difference of 0.65 mm / 0.0256 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Denis Wick 4BL and Yamaha SL-48L-GP?

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

Denis Wick 4BL vs Yamaha SL-48L-GP

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

The Denis Wick 4BL has a wider cup diameter, the Denis Wick 4BL 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

Denis Wick 4BL

• Trombone

Backboremedium

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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Denis Wick 4BL vs Yamaha SL-48L-GP

Playing Characteristics

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