Curry 1.5 BBC vs Kelly 3C
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Curry 1.5 BBC
• Cornet
Cup diameter17.02 mm / 0.6700 in
Cup depthVery deep
Rim width—
Throat diameter4.06 mm / 0.1600 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Kelly 3C
• Cornet
GeneralCup diameter17.02 mm / 0.6701 in
Cup depthVery deep
Rim width—
Throat diameter4.06 mm / 0.1598 in
BackboreL
Finish—
MaterialLexan polycarbonate
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
All-purpose mid-range
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 17.02 mm / 0.6700 in.
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 4.06 mm / 0.1600 in, so resistance feel will be comparable.
Material
The Curry 1.5 BBC is described as unspecified, and the Kelly 3C as Lexan polycarbonate. 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.