Bach 1B vs Yamaha CR-DUTOT-L
The Bach 1B has a wider cup diameter, the Bach 1B features a deeper cup, the Yamaha CR-DUTOT-L has a larger throat opening.
Cup Diameter
The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 16.95 mm / 0.6673 in on the Yamaha CR-DUTOT-L — a difference of 0.05 mm / 0.0020 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 1B has a deep cup while the Yamaha CR-DUTOT-L has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Yamaha CR-DUTOT-L has a wider throat (3.72 mm / 0.1465 in vs 3.66 mm / 0.1441 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.