Bach 22C vs Yamaha EP-51DL
The Yamaha EP-51DL has a wider cup diameter, the Yamaha EP-51DL features a deeper cup, the Yamaha EP-51DL has a larger throat opening.
Cup Diameter
The Yamaha EP-51DL has a cup diameter of 25.24 mm compared to 23.92 mm on the Bach 22C — a difference of +1.32 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Yamaha EP-51DL has a deep cup while the Bach 22C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Yamaha EP-51DL has a wider throat (7.11 mm vs 5.85 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.