Kelly 7C vs Schilke 11AX
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Kelly 7C
• Trumpet
GeneralCup diameter16.51 mm / 0.6500 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
BackboreS
Finish—
MaterialLexan polycarbonate
Best suited for
All-round versatile — balanced cup for general playing
Beginner / intermediate; industry standard
vs
Mouthpiece B
Schilke 11AX
• Trumpet
Cup diameter16.51 mm / 0.6500 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore27
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.51 mm / 0.6500 in.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
Material
The Kelly 7C is described as Lexan polycarbonate, and the Schilke 11AX as unspecified. Material affects mass, warmth, and how quickly the piece responds.
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.