Which has a bigger cup — Bob Reeves 40/C/692sL or Giardinelli 12C?

The Bob Reeves 40/C/692sL has a cup diameter of 15.88 mm / 0.6252 in compared to 15.50 mm / 0.6102 in on the Giardinelli 12C — a difference of 0.38 mm / 0.0150 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/692sL and Giardinelli 12C?

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

Bob Reeves 40/C/692sL vs Giardinelli 12C

Name: Giardinelli 12C
Brand: Giardinelli

The Bob Reeves 40/C/692sL 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 40/C/692sL

• Cornet

Backbore692sL

Mouthpiece B

Giardinelli 12C

• Cornet

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.