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Bach 6½AL (large shank) vs Giardinelli 6D

The Bach 6½AL (large shank) has a wider cup diameter, the Bach 6½AL (large shank) has a larger throat opening.

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
    Bach 6½AL (large shank)
    • Trombone
    Cup diameter25.40 mm / 1.0000 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Giardinelli 6D
      • Trombone
      Cup diameter24.50 mm / 0.9646 in
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bach 6½AL (large shank) has a cup diameter of 25.40 mm / 1.0000 in compared to 24.50 mm / 0.9646 in on the Giardinelli 6D — a difference of 0.90 mm / 0.0354 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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.

      Open in interactive tool + Add third mouthpiece Bach 6½AL (large shank) details Giardinelli 6D details Bach 6½AL (large shank) equivalents Giardinelli 6D equivalents

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