Bach 12E vs Bob Reeves Jay Friedman Signature
The Bob Reeves Jay Friedman Signature has a wider cup diameter, the Bob Reeves Jay Friedman Signature features a deeper cup.
Mouthpiece A
Bach 12E
• Trombone
Cup diameter24.50 mm / 0.9646 in
Cup depthShallow
Rim width—
Throat diameter5.85 mm / 0.2303 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bob Reeves Jay Friedman Signature
• Trombone
Cup diameter26.26 mm / 1.0339 in
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 Jay Friedman Signature has a cup diameter of 26.26 mm / 1.0339 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.76 mm / 0.0693 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bob Reeves Jay Friedman Signature has a deep cup while the Bach 12E 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 12E with others
Compare Bob Reeves Jay Friedman Signature with others
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