Which has a bigger cup — Bruno Tilz 310-M 21 or Marcinkiewicz CH ETU1?

The Marcinkiewicz CH ETU1 has a cup diameter of 33.15 mm / 1.3051 in compared to 33.00 mm / 1.2992 in on the Bruno Tilz 310-M 21 — a difference of 0.15 mm / 0.0059 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bruno Tilz 310-M 21 and Marcinkiewicz CH ETU1?

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

Bruno Tilz 310-M 21 vs Marcinkiewicz CH ETU1

Name: Marcinkiewicz CH ETU1
Brand: Marcinkiewicz

The Marcinkiewicz CH ETU1 has a wider cup diameter, the Bruno Tilz 310-M 21 has a larger throat opening.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bruno Tilz 310-M 21

• Tuba

Catalog

Rim width—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Marcinkiewicz CH ETU1

• Tuba

Rim width—

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.

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Bruno Tilz 310-M 21 vs Marcinkiewicz CH ETU1

Playing Characteristics

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What Changes If You Switch?

Which is better?

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