Schilke 45B vs Schilke 52D
The Schilke 52D has a wider cup diameter, the Schilke 52D features a deeper cup, the Schilke 52D has a larger throat opening.
Cup Diameter
The Schilke 52D has a cup diameter of 25.78 mm / 1.0150 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 1.48 mm / 0.0583 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 52D has a deep cup while the Schilke 45B has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke 52D has a wider throat (6.35 mm / 0.2500 in vs 5.95 mm / 0.2343 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.