Denis Wick 3 vs Kelly 6V
The Denis Wick 3 has a wider cup diameter, the Kelly 6V features a deeper cup, the Denis Wick 3 has a larger throat opening.
Cup Diameter
The Denis Wick 3 has a cup diameter of 16.75 mm / 0.6594 in compared to 16.00 mm / 0.6299 in on the Kelly 6V — a difference of 0.75 mm / 0.0295 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly 6V has a — cup while the Denis Wick 3 has a very deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick 3 has a wider throat (4.57 mm / 0.1799 in vs 4.06 mm / 0.1598 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Material
The Denis Wick 3 is described as unspecified, and the Kelly 6V 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.