Schilke S-H vs Yamaha BB-SELF
The Yamaha BB-SELF has a wider cup diameter, the Yamaha BB-SELF has a larger throat opening.
Mouthpiece A
Schilke S-H
• Tuba
Cup diameter31.84 mm
Cup depthMedium
Rim width—
Throat diameter7.49 mm
BackboreM.295"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha BB-SELF
• Tuba
Cup diameter32.86 mm
Cup depthMedium
Rim width—
Throat diameter8.00 mm
BackboreStandard
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha BB-SELF has a cup diameter of 32.86 mm compared to 31.84 mm on the Schilke S-H — a difference of +1.02 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Yamaha BB-SELF has a wider throat (8.00 mm vs 7.49 mm). 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.