Bach 1C vs Schilke 13B
The Bach 1C has a wider cup diameter, the Schilke 13B features a deeper cup, the Bach 1C has a larger throat opening.
Cup Diameter
The Bach 1C has a cup diameter of 17.00 mm compared to 16.77 mm on the Schilke 13B — a difference of +0.23 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 13B has a deep cup while the Bach 1C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 1C has a wider throat (3.66 mm vs 3.65 mm). 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.