Bruno Tilz 231-C 5 vs Bruno Tilz 310-M 35
The Bruno Tilz 310-M 35 has a wider cup diameter, the Bruno Tilz 310-M 35 has a larger throat opening.
Mouthpiece A
Bruno Tilz 231-C 5
• Tuba
CatalogCup diameter33.50 mm
Cup depthDeep
Rim width—
Throat diameter8.20 mm
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 310-M 35
• Tuba
CatalogCup diameter34.00 mm
Cup depthDeep
Rim width—
Throat diameter8.60 mm
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 310-M 35 has a cup diameter of 34.00 mm compared to 33.50 mm on the Bruno Tilz 231-C 5 — a difference of +0.50 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bruno Tilz 310-M 35 has a wider throat (8.60 mm vs 8.20 mm). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.