Which has a bigger cup — Bach 1½C or Bob Reeves RP8?

The Bach 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.67 mm / 0.6563 in on the Bob Reeves RP8 — a difference of 0.33 mm / 0.0130 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1½C and Bob Reeves RP8?

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

Bach 1½C vs Bob Reeves RP8

Name: Bob Reeves RP8
Brand: Bob Reeves

The Bach 1½C 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 1½C

• Trumpet

Finish—

Mouthpiece B

Bob Reeves RP8

• Trumpet

Finish—

Best suited for

🎵All-round versatile — balanced cup for general playing

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.