Bach 5SV vs Denis Wick 4B
The Denis Wick 4B has a wider cup diameter, the Denis Wick 4B features a deeper cup, the Denis Wick 4B has a larger throat opening.
Cup Diameter
The Denis Wick 4B has a cup diameter of 16.50 mm / 0.6496 in compared to 16.25 mm / 0.6398 in on the Bach 5SV — a difference of 0.25 mm / 0.0098 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 4B has a medium cup while the Bach 5SV has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick 4B has a wider throat (4.27 mm / 0.1681 in vs 3.81 mm / 0.1500 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.