Which has a bigger cup — Bach 11 or Bach 12E?

The Bach 11 has a cup diameter of 24.70 mm / 0.9724 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 11 and Bach 12E?

The Bach 11 has a deep cup while the Bach 12E has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 11 vs Bach 12E

Name: Bach 12E
Brand: Bach

The Bach 11 has a wider cup diameter, the Bach 11 features a deeper cup.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 11

• Trombone

Finish—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Bach 12E

• Trombone

Finish—

Best suited for

📣High-volume projection — open throat for power

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.