Which has a bigger cup — Bach 12 or Yamaha BB-SELF?

The Yamaha BB-SELF has a cup diameter of 32.86 mm / 1.2937 in compared to 32.75 mm / 1.2894 in on the Bach 12 — a difference of 0.11 mm / 0.0043 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 12 and Yamaha BB-SELF?

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

Bach 12 vs Yamaha BB-SELF

Name: Yamaha BB-SELF
Brand: Yamaha

The Yamaha BB-SELF has a wider cup diameter, the Bach 12 has a larger throat opening.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 12

• Tuba

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha BB-SELF

• Tuba

Material—

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.

Open in interactive tool + Add third mouthpiece Bach 12 details Yamaha BB-SELF details Bach 12 equivalents Yamaha BB-SELF equivalents

Bach 12 vs Yamaha BB-SELF

Playing Characteristics

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