GR Technologies 63S vs Marcinkiewicz CH 13
The Marcinkiewicz CH 13 has a wider cup diameter, the Marcinkiewicz CH 13 features a deeper cup.
Mouthpiece A
GR Technologies 63S
• Trumpet
Cup diameter16.00 mm / 0.6299 in
Cup depthShallow
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Marcinkiewicz CH 13
• Trumpet
Cup diameter16.31 mm / 0.6421 in
Cup depthVery deep
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore—
Finish—
Material—
Cup Diameter
The Marcinkiewicz CH 13 has a cup diameter of 16.31 mm / 0.6421 in compared to 16.00 mm / 0.6299 in on the GR Technologies 63S — a difference of 0.31 mm / 0.0122 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Marcinkiewicz CH 13 has a very deep cup while the GR Technologies 63S 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.