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

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 43N/F — 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 43N/F?

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 43N/F

Name: Bob Reeves 43N/F
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 taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bob Reeves 43.5/FE

• Flugelhorn

Backbore—

Mouthpiece B

Bob Reeves 43N/F

• Flugelhorn

Backbore—

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.