Bob Reeves 42/ES/692sL vs Warburton 5SV
The Bob Reeves 42/ES/692sL has a wider cup diameter.
Mouthpiece A
Bob Reeves 42/ES/692sL
• Trumpet
Cup diameter16.67 mm
Cup depthVery shallow
Rim width—
Throat diameter—
Backbore692sL
Finish—
Material—
vs
Mouthpiece B
Warburton 5SV
Silver plate · Trumpet
LeadCup diameter16.20 mm
Cup depthVery shallow
Rim width6.40 mm
Throat diameter3.66 mm
Backbore—
FinishSilver plate
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
Cup Diameter
The Bob Reeves 42/ES/692sL has a cup diameter of 16.67 mm compared to 16.20 mm on the Warburton 5SV — a difference of +0.47 mm. 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.
Finish
The Bob Reeves 42/ES/692sL is listed as unspecified, and the Warburton 5SV as Silver plate. Finish mainly changes lip feel, tarnish resistance, and appearance rather than cup geometry.
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.