Denis Wick 4L vs Yamaha BB-64
The Denis Wick 4L has a wider cup diameter, the Denis Wick 4L features a deeper cup, the Yamaha BB-64 has a larger throat opening.
Cup Diameter
The Denis Wick 4L has a cup diameter of 30.50 mm / 1.2008 in compared to 30.45 mm / 1.1988 in on the Yamaha BB-64 — a difference of 0.05 mm / 0.0020 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 4L has a very deep cup while the Yamaha BB-64 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Yamaha BB-64 has a wider throat (8.35 mm / 0.3287 in vs 8.27 mm / 0.3256 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.