Bach 7 vs Bob Reeves 42/ES/692sL
The Bob Reeves 42/ES/692sL has a wider cup diameter, the Bach 7 features a deeper cup.
Mouthpiece A
Bach 7
• Trumpet
Cup diameter16.20 mm
Cup depthVery deep
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
vs
Mouthpiece B
Bob Reeves 42/ES/692sL
• Trumpet
Cup diameter16.67 mm
Cup depthVery shallow
Rim width—
Throat diameter—
Backbore692sL
Finish—
Material—
Cup Diameter
The Bob Reeves 42/ES/692sL has a cup diameter of 16.67 mm compared to 16.20 mm on the Bach 7 — a difference of +0.47 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 7 has a very deep cup while the Bob Reeves 42/ES/692sL has a very 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.