Which has a bigger cup — Bob Reeves 43.5/FE or Bob Reeves 43/FE?

The Bob Reeves 43.5/FE has a cup diameter of 17.26 mm / 0.6795 in compared to 17.07 mm / 0.6720 in on the Bob Reeves 43/FE — a difference of 0.19 mm / 0.0075 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 43.5/FE and Bob Reeves 43/FE?

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

Bob Reeves 43.5/FE vs Bob Reeves 43/FE

Name: Bob Reeves 43/FE
Brand: Bob Reeves

The Bob Reeves 43.5/FE has a wider cup diameter.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bob Reeves 43.5/FE

• Flugelhorn

Throat diameter—

Mouthpiece B

Bob Reeves 43/FE

• Flugelhorn

Throat diameter—

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.