Bob Reeves 43.5/ES/69 vs Marcinkiewicz 5*W (Endorsee)
The Bob Reeves 43.5/ES/69 has a wider cup diameter.
Mouthpiece A
Bob Reeves 43.5/ES/69
• Cornet
Cup diameter17.26 mm / 0.6795 in
Cup depthVery shallow
Rim width—
Throat diameter—
Backbore69
Finish—
Material—
vs
Mouthpiece B
Marcinkiewicz 5*W (Endorsee)
• Cornet
Cup diameter16.76 mm / 0.6598 in
Cup depthVery shallow
Rim width—
Throat diameter3.91 mm / 0.1539 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bob Reeves 43.5/ES/69 has a cup diameter of 17.26 mm / 0.6795 in compared to 16.76 mm / 0.6598 in on the Marcinkiewicz 5*W (Endorsee) — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a very shallow 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.