Marcinkiewicz CH 5J BS vs Schilke 51D
the Marcinkiewicz CH 5J BS features a deeper cup.
Mouthpiece A
Marcinkiewicz CH 5J BS
• Trombone
Cup diameter25.55 mm / 1.0059 in
Cup depthDeep
Rim width—
Throat diameter7.04 mm / 0.2772 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 51D
• Trombone
Cup diameter25.55 mm / 1.0059 in
Cup depthMedium
Rim width—
Throat diameter7.04 mm / 0.2772 in
BackboreJ .277"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 25.55 mm / 1.0059 in.
Cup Depth
The Marcinkiewicz CH 5J BS has a deep cup while the Schilke 51D has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 7.04 mm / 0.2772 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.