Bob Reeves 40/SV/692sL vs Monette D1-4 FL
The Monette D1-4 FL has a wider cup diameter, the Monette D1-4 FL features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 40/SV/692sL
• Trumpet
Cup diameter15.88 mm / 0.6252 in
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Monette D1-4 FL
• Trumpet
Cup diameter17.00 mm / 0.6693 in
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Monette D1-4 FL has a cup diameter of 17.00 mm / 0.6693 in compared to 15.88 mm / 0.6252 in on the Bob Reeves 40/SV/692sL — a difference of 1.12 mm / 0.0441 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.