Bach 12 vs Bach 16
The Bach 12 has a wider cup diameter, the Bach 16 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 12
• French Horn
Cup diameter16.50 mm / 0.6496 in
Best suited for
All-round versatile — balanced cup for general playing
High-volume projection — open throat for power
vs
Mouthpiece B
Bach 16
• French Horn
Cup diameter16.25 mm / 0.6398 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 12 has a cup diameter of 16.50 mm / 0.6496 in compared to 16.25 mm / 0.6398 in on the Bach 16 — a difference of 0.25 mm / 0.0098 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.