GR Technologies 67MX vs Yamaha TR-14B4
The GR Technologies 67MX has a wider cup diameter, the GR Technologies 67MX features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
GR Technologies 67MX
• Trumpet
Cup depthDeep
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Yamaha TR-14B4
• Trumpet
Cup depthShallow
Cup Depth
The GR Technologies 67MX has a deep cup while the Yamaha TR-14B4 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.