Schilke 59 vs Yamaha SL-48L
The Schilke 59 has a wider cup diameter, the Schilke 59 features a deeper cup, the Schilke 59 has a larger throat opening.
Cup Diameter
The Schilke 59 has a cup diameter of 28.52 mm / 1.1228 in compared to 25.25 mm / 0.9941 in on the Yamaha SL-48L — a difference of 3.27 mm / 0.1287 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 59 has a deep cup while the Yamaha SL-48L has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke 59 has a wider throat (7.54 mm / 0.2969 in vs 6.62 mm / 0.2606 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.