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Bach Mega Tone Trombone 11C vs Bob Reeves 5G-4G

The Bob Reeves 5G-4G has a wider cup diameter, the Bob Reeves 5G-4G features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bach Mega Tone Trombone 11C
    • Trombone
    Cup diameter24.70 mm
    Cup depthShallow
    Rim width—
    Throat diameter5.85 mm
    Backbore—
    Finish—
    Material—
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bob Reeves 5G-4G
      • Trombone
      Cup diameter25.55 mm
      Cup depthVery deep
      Rim width—
      Throat diameter—
      Backbore—
      Finish—
      Material—
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone

      Cup Diameter

      The Bob Reeves 5G-4G has a cup diameter of 25.55 mm compared to 24.70 mm on the Bach Mega Tone Trombone 11C — a difference of +0.85 mm. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      The Bob Reeves 5G-4G has a very deep cup while the Bach Mega Tone Trombone 11C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      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 Mega Tone Trombone 11C details Bob Reeves 5G-4G details Bach Mega Tone Trombone 11C equivalents Bob Reeves 5G-4G equivalents

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