Which has a bigger cup — Bach 1¼C or Bob Reeves 40/M/2?

The Bach 1¼C has a cup diameter of 17.00 mm / 0.6693 in compared to 15.88 mm / 0.6252 in on the Bob Reeves 40/M/2 — a difference of 1.12 mm / 0.0441 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1¼C and Bob Reeves 40/M/2?

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

Bach 1¼C vs Bob Reeves 40/M/2

Name: Bob Reeves 40/M/2
Brand: Bob Reeves

The Bach 1¼C has a wider cup diameter.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 1¼C

• Trumpet

Material—

Mouthpiece B

Bob Reeves 40/M/2

• Trumpet

Material—

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.