Denis Wick SM4M vs Yamaha AH-38D4
The Denis Wick SM4M has a wider cup diameter, the Denis Wick SM4M features a deeper cup, the Denis Wick SM4M has a larger throat opening.
Cup Diameter
The Denis Wick SM4M has a cup diameter of 26.00 mm / 1.0236 in compared to 18.90 mm / 0.7441 in on the Yamaha AH-38D4 — a difference of 7.10 mm / 0.2795 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick SM4M has a very deep cup while the Yamaha AH-38D4 has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick SM4M has a wider throat (7.38 mm / 0.2906 in vs 5.25 mm / 0.2067 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.