Bruno Tilz 231-C 4 vs Conn Imp. Precision 4
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Bruno Tilz 231-C 4
• Tuba
CatalogCup diameter33.00 mm / 1.2992 in
Cup depthDeep
Rim width—
Throat diameter8.20 mm / 0.3228 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Conn Imp. Precision 4
• Tuba
GeneralCup diameter—
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
MaterialSilver-plated brass
Best suited for
Small Eb bass
Full rich tone
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Material
The Bruno Tilz 231-C 4 is described as unspecified, and the Conn Imp. Precision 4 as Silver-plated brass. Material affects mass, warmth, and how quickly the piece responds.
Which is better?
The Bruno Tilz 231-C 4 is designed for catalog playing, while the Conn Imp. Precision 4 targets general use. Your best choice depends on your musical context.