Bach 22 vs Bach Mega Tone Tuba 12
The Bach Mega Tone Tuba 12 has a wider cup diameter.
Mouthpiece A
Bach 22
• Tuba
Cup diameter31.60 mm
Cup depthMedium
Rim width—
Throat diameter8.33 mm
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bach Mega Tone Tuba 12
• Tuba
Cup diameter32.75 mm
Cup depthMedium
Rim width—
Throat diameter8.33 mm
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach Mega Tone Tuba 12 has a cup diameter of 32.75 mm compared to 31.60 mm on the Bach 22 — a difference of +1.15 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
Throat diameters are essentially identical at 8.33 mm, so resistance feel will be comparable.
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.