Which has a bigger cup — Bach 1X or Bach 8½A?

The Bach 1X has a cup diameter of 17.00 mm / 0.6693 in compared to 16.10 mm / 0.6339 in on the Bach 8½A — a difference of 0.90 mm / 0.0354 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Bach 1X vs Bach 8½A

Name: Bach 8½A
Brand: Bach

The Bach 1X has a wider cup diameter.

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

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Bach 1X

• Cornet

Cup depthVery deep

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Bach 8½A

• Cornet

Cup depthVery deep

Cup Depth

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

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.