Kelly SHEW-JAZZ vs Monette Vintage original AP2
The Monette Vintage original AP2 has a wider cup diameter, the Kelly SHEW-JAZZ features a deeper cup, the Kelly SHEW-JAZZ has a larger throat opening.
Cup Diameter
The Monette Vintage original AP2 has a cup diameter of 17.00 mm compared to 16.51 mm on the Kelly SHEW-JAZZ — a difference of +0.49 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly SHEW-JAZZ has a — cup while the Monette Vintage original AP2 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Kelly SHEW-JAZZ has a wider throat (4.06 mm vs 3.66 mm). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Material
The Kelly SHEW-JAZZ is described as Lexan polycarbonate, and the Monette Vintage original AP2 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.