Bob Reeves 40/B/692 vs Marcinkiewicz 5*W (Endorsee)
The Marcinkiewicz 5*W (Endorsee) has a wider cup diameter, the Bob Reeves 40/B/692 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 40/B/692
• Cornet
Cup diameter15.88 mm / 0.6252 in
vs
Mouthpiece B
Marcinkiewicz 5*W (Endorsee)
• Cornet
Cup diameter16.76 mm / 0.6598 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Marcinkiewicz 5*W (Endorsee) has a cup diameter of 16.76 mm / 0.6598 in compared to 15.88 mm / 0.6252 in on the Bob Reeves 40/B/692 — a difference of 0.88 mm / 0.0346 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.