Which has a bigger cup — Bach 3 or Bach 3C?

Both mouthpieces have virtually identical cup diameters at 16.30 mm / 0.6417 in.

How does cup depth compare between Bach 3 and Bach 3C?

The Bach 3 has a very deep cup while the Bach 3C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 3 vs Bach 3C

Name: Bach 3C
Brand: Bach

the Bach 3 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bach 3

• Trumpet

Rim width—

Mouthpiece B

Bach 3C

• Trumpet

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

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.