Which has a bigger cup — Bach 1¼C or Bob Reeves 42/M/692?

The Bach 1¼C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.67 mm / 0.6563 in on the Bob Reeves 42/M/692 — a difference of 0.33 mm / 0.0130 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Bach 1¼C vs Bob Reeves 42/M/692

Name: Bob Reeves 42/M/692
Brand: Bob Reeves

The Bach 1¼C 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 1¼C

• Trumpet

Cup depthMedium

Mouthpiece B

Bob Reeves 42/M/692

• Trumpet

Cup depthMedium

Best suited for

🎵All-round versatile — balanced cup for general playing

Cup Depth

Both mouthpieces share a medium 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.

Open in interactive tool + Add third mouthpiece Bach 1¼C details Bob Reeves 42/M/692 details Bach 1¼C equivalents Bob Reeves 42/M/692 equivalents

Bach 1¼C vs Bob Reeves 42/M/692

Cup Depth

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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