Bob Reeves 40/SV/692sL vs Bob Reeves 42/B/s
The Bob Reeves 42/B/s has a wider cup diameter, the Bob Reeves 42/B/s features a deeper cup.
Mouthpiece A
Bob Reeves 40/SV/692sL
• Trumpet
Cup diameter15.88 mm
Cup depthShallow
Rim width—
Throat diameter—
Backbore692sL
Finish—
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Bob Reeves 42/B/s
• Trumpet
Cup diameter16.67 mm
Cup depthVery deep
Rim width—
Throat diameter—
Backbores
Finish—
Material—
Cup Diameter
The Bob Reeves 42/B/s has a cup diameter of 16.67 mm compared to 15.88 mm on the Bob Reeves 40/SV/692sL — a difference of +0.79 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bob Reeves 42/B/s has a very deep cup while the Bob Reeves 40/SV/692sL has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.