Which has a bigger cup — Bach 1 or Bob Reeves 43N/B/692sL?

The Bach 1 has a cup diameter of 17.50 mm / 0.6890 in compared to 17.07 mm / 0.6720 in on the Bob Reeves 43N/B/692sL — a difference of 0.43 mm / 0.0169 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1 and Bob Reeves 43N/B/692sL?

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

Bach 1 vs Bob Reeves 43N/B/692sL

Name: Bob Reeves 43N/B/692sL
Brand: Bob Reeves

The Bach 1 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 1

• Trumpet

Finish—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Bob Reeves 43N/B/692sL

• Trumpet

Finish—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

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.

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Bach 1 vs Bob Reeves 43N/B/692sL

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