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Bruno Tilz 306-5 GS vs Conn Precision 1

the Conn Precision 1 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Bruno Tilz 306-5 GS
    • Trombone
    Catalog
    Cup diameter26.00 mm / 1.0236 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Conn Precision 1
      • Trombone
      Orchestral
      Cup diameter—
      Best suited for
      📋Large bore trombones; symphony work
      🎶Good clear tone; large bore symphonic

      Which is better?

      The Bruno Tilz 306-5 GS is designed for catalog playing, while the Conn Precision 1 targets orchestral use. Your best choice depends on your musical context.

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