Bach 12 vs Denis Wick 2L
The Bach 12 has a wider cup diameter, the Denis Wick 2L features a deeper cup, the Denis Wick 2L has a larger throat opening.
Cup Diameter
The Bach 12 has a cup diameter of 32.75 mm / 1.2894 in compared to 32.00 mm / 1.2598 in on the Denis Wick 2L — 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 Denis Wick 2L has a very deep cup while the Bach 12 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 2L has a wider throat (8.45 mm / 0.3327 in vs 8.33 mm / 0.3280 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.