Bach 1B vs Bach 7C
The Bach 1B has a wider cup diameter, the Bach 1B features a deeper cup.
Mouthpiece A
Bach 1B
• Cornet
Cup diameter17.00 mm
Cup depthDeep
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Bach 7C
• Cornet
Cup diameter16.20 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
The Bach 1B has a cup diameter of 17.00 mm compared to 16.20 mm on the Bach 7C — a difference of +0.80 mm. 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 Bach 7C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm, so resistance feel will be comparable.
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.