Home › Trombone › Bach 12C vs Bach 6

Bach 12C vs Bach 6

The Bach 6 has a wider cup diameter, the Bach 6 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
    Bach 12C
    • Trombone
    Throat diameter5.85 mm / 0.2303 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bach 6
      • Trombone
      Throat diameter5.85 mm / 0.2303 in
      Best suited for
      📣High-volume projection — open throat for power

      Throat Diameter

      Throat diameters are essentially identical at 5.85 mm / 0.2303 in, so resistance feel will be comparable.

      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 12C details Bach 6 details Bach 12C equivalents Bach 6 equivalents

      Compare Bach 12C with others

      Compare Bach 6 with others

      Popular Trombone comparisons

      Browse by specification