Bach 5C vs GR Technologies X66.8 C*
The GR Technologies X66.8 C* has a wider cup diameter, the GR Technologies X66.8 C* features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Bach 5C
• Trumpet
Cup depthMedium
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
GR Technologies X66.8 C*
• Trumpet
Cup depthDeep
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Depth
The GR Technologies X66.8 C* has a deep cup while the Bach 5C 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.