Denis Wick RW3 vs Kelly 7C
The Denis Wick RW3 has a wider cup diameter, the Denis Wick RW3 features a deeper cup, the Denis Wick RW3 has a larger throat opening.
Cup Diameter
The Denis Wick RW3 has a cup diameter of 16.75 mm / 0.6594 in compared to 16.51 mm / 0.6500 in on the Kelly 7C — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick RW3 has a very deep cup while the Kelly 7C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick RW3 has a wider throat (4.57 mm / 0.1799 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Material
The Denis Wick RW3 is described as unspecified, and the Kelly 7C 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.