Kelly 18 vs Monette Tuba 98 (Lightweight)
the Kelly 18 features a deeper cup.
Mouthpiece A
Kelly 18
• Tuba
GeneralCup diameter32.77 mm / 1.2902 in
Cup depth
Rim width—
Throat diameter—
BackboreM
Finish—
MaterialLexan polycarbonate
Best suited for
Orchestral playing — large cup for full, dark tone
Industry-standard tuba
vs
Mouthpiece B
Monette Tuba 98 (Lightweight)
• Tuba
Cup diameter—
Cup depthMedium
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Cup Depth
The Kelly 18 has a — cup while the Monette Tuba 98 (Lightweight) has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
The Kelly 18 is described as Lexan polycarbonate, and the Monette Tuba 98 (Lightweight) 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.