Bach 32E vs Bruno Tilz 310-M 12
The Bruno Tilz 310-M 12 has a wider cup diameter, the Bach 32E has a larger throat opening.
Mouthpiece A
Bach 32E
• Tuba
Cup diameter29.50 mm
Cup depthShallow
Rim width—
Throat diameter8.33 mm
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 310-M 12
• Tuba
CatalogCup diameter32.50 mm
Cup depthShallow
Rim width—
Throat diameter7.40 mm
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 310-M 12 has a cup diameter of 32.50 mm compared to 29.50 mm on the Bach 32E — a difference of +3.00 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bach 32E has a wider throat (8.33 mm vs 7.40 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.