Bach 22 vs Schilke 66
The Bach 22 has a wider cup diameter.
Mouthpiece A
Bach 22
• Tuba
Cup diameter31.60 mm / 1.2441 in
Cup depthMedium
Rim width—
Throat diameter8.33 mm / 0.3280 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 66
• Tuba
Cup diameter31.52 mm / 1.2409 in
Cup depthMedium
Rim width—
Throat diameter8.33 mm / 0.3280 in
Backbore21/64.3281"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 22 has a cup diameter of 31.60 mm / 1.2441 in compared to 31.52 mm / 1.2409 in on the Schilke 66 — a difference of 0.08 mm / 0.0031 in. 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 / 0.3280 in, 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.