GR Technologies 64MS vs Yamaha TR-14B4
The Yamaha TR-14B4 has a wider cup diameter, the GR Technologies 64MS features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
GR Technologies 64MS
• Trumpet
Throat diameter—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Yamaha TR-14B4
• Trumpet
Throat diameter3.65 mm / 0.1437 in
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.