GR Technologies 66M vs Marcinkiewicz E18E. Miyashiro
The GR Technologies 66M has a wider cup diameter, the Marcinkiewicz E18E. Miyashiro features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
GR Technologies 66M
• Trumpet
Cup depthMedium
vs
Mouthpiece B
Marcinkiewicz E18E. Miyashiro
• Trumpet
Cup depthVery deep
Cup Depth
The Marcinkiewicz E18E. Miyashiro has a very deep cup while the GR Technologies 66M has a medium 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.