Bob Reeves 40/C/692 vs Giardinelli 17C
The Bob Reeves 40/C/692 has a wider cup diameter.
Mouthpiece A
Bob Reeves 40/C/692
• Cornet
Cup diameter15.88 mm / 0.6252 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore692
Finish—
Material—
vs
Mouthpiece B
Giardinelli 17C
• Cornet
Cup diameter15.00 mm / 0.5906 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Cup Diameter
The Bob Reeves 40/C/692 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.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
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.