Which has a bigger cup — Schilke 66 or Yamaha BB-67C4?

The Yamaha BB-67C4 has a cup diameter of 32.06 mm / 1.2622 in compared to 31.52 mm / 1.2409 in on the Schilke 66 — a difference of 0.54 mm / 0.0213 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Schilke 66 and Yamaha BB-67C4?

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

Schilke 66 vs Yamaha BB-67C4

Name: Yamaha BB-67C4
Brand: Yamaha

The Yamaha BB-67C4 has a wider cup diameter, the Schilke 66 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 66

• Tuba

Backbore21/64.3281"

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha BB-67C4

• Tuba

BackboreStandard

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 66 vs Yamaha BB-67C4

Playing Characteristics

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