Bach 12E vs Marcinkiewicz ET1B. PeeblesBass Shank Only

The Marcinkiewicz ET1B. PeeblesBass Shank Only has a wider cup diameter, the Bach 12E features a deeper cup, the Marcinkiewicz ET1B. PeeblesBass Shank Only has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.
Mouthpiece A
    Bach 12E
    • Trombone
    Finish
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Marcinkiewicz ET1B. PeeblesBass Shank Only
      • Trombone
      Finish
      Best suited for
      📣High-volume projection — open throat for power

      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 12E details Marcinkiewicz ET1B. PeeblesBass Shank Only details Bach 12E equivalents Marcinkiewicz ET1B. PeeblesBass Shank Only equivalents