Which has a bigger cup — Bob Reeves 40/C/s or Giardinelli 17C?

The Bob Reeves 40/C/s has a cup diameter of 15.88 mm / 0.6252 in compared to 15.00 mm / 0.5906 in on the Giardinelli 17C — a difference of 0.88 mm / 0.0346 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 40/C/s and Giardinelli 17C?

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

Bob Reeves 40/C/s vs Giardinelli 17C

Name: Giardinelli 17C
Brand: Giardinelli

The Bob Reeves 40/C/s 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 40/C/s

• Cornet

Throat diameter—

Mouthpiece B

Giardinelli 17C

• Cornet

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.