Bach 15CW vs Bob Reeves 5G Gladstone
The Bob Reeves 5G Gladstone has a wider cup diameter, the Bob Reeves 5G Gladstone features a deeper cup.
Mouthpiece A
Bach 15CW
• Trombone
Cup diameter24.40 mm
Cup depthShallow
Rim width—
Throat diameter5.85 mm
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bob Reeves 5G Gladstone
• Trombone
Cup diameter25.55 mm
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Bob Reeves 5G Gladstone has a cup diameter of 25.55 mm compared to 24.40 mm on the Bach 15CW — a difference of +1.15 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bob Reeves 5G Gladstone has a deep cup while the Bach 15CW 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.
Compare Bach 15CW with others
Compare Bob Reeves 5G Gladstone with others
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