Which has a bigger cup — Bach 1B or Bach 7BW?

The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 16.20 mm / 0.6378 in on the Bach 7BW — a difference of 0.80 mm / 0.0315 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1B and Bach 7BW?

Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.

Bach 1B vs Bach 7BW

Name: Bach 7BW
Brand: Bach

The Bach 1B has a wider cup diameter.

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 1B

• Cornet

Finish—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Bach 7BW

• Cornet

Finish—

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.