Which has a bigger cup — Bach 1½C or Bach 1B?

Both mouthpieces have virtually identical cup diameters at 17.00 mm / 0.6693 in.

How does cup depth compare between Bach 1½C and Bach 1B?

The Bach 1B has a deep cup while the Bach 1½C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 1½C vs Bach 1B

Name: Bach 1B
Brand: Bach

the Bach 1B 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 1½C

• Cornet

Rim width—

Mouthpiece B

Bach 1B

• Cornet

Rim width—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

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.