Kelly SCREAMER-BUGLE vs Yamaha TR-14B4
The Yamaha TR-14B4 has a wider cup diameter, the Yamaha TR-14B4 has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Kelly SCREAMER-BUGLE
• Trumpet
LeadThroat diameter3.56 mm / 0.1402 in
Best suited for
Lead / commercial — shallow cup for brightness and range
Screamer / high notes — tight throat with shallow cup
Lead bugle; high register
vs
Mouthpiece B
Yamaha TR-14B4
• Trumpet
Throat diameter3.65 mm / 0.1437 in
Throat Diameter
The Yamaha TR-14B4 has a wider throat (3.65 mm / 0.1437 in vs 3.56 mm / 0.1402 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.