Which has a bigger cup — Bruno Tilz 231-C 4 or Giardinelli 25?

The Bruno Tilz 231-C 4 has a cup diameter of 33.00 mm / 1.2992 in compared to 32.60 mm / 1.2835 in on the Giardinelli 25 — a difference of 0.40 mm / 0.0157 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bruno Tilz 231-C 4 and Giardinelli 25?

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

Bruno Tilz 231-C 4 vs Giardinelli 25

Name: Giardinelli 25
Brand: Giardinelli

The Bruno Tilz 231-C 4 has a wider cup diameter, the Giardinelli 25 has a larger throat opening.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bruno Tilz 231-C 4

• Tuba

Catalog

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Giardinelli 25

• Tuba

Backbore21/64"

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣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 231-C 4 vs Giardinelli 25

Playing Characteristics

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