Which has a bigger cup — Bach 1B or Bob Reeves 41/D/s?

The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 16.27 mm / 0.6406 in on the Bob Reeves 41/D/s — a difference of 0.73 mm / 0.0287 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1B and Bob Reeves 41/D/s?

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

Bach 1B vs Bob Reeves 41/D/s

Name: Bob Reeves 41/D/s
Brand: Bob Reeves

The Bach 1B has a wider cup diameter.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 1B

• Cornet

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Bob Reeves 41/D/s

• Cornet

Backbores

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.