Bach 12E vs Schilke 52E2
The Schilke 52E2 has a wider cup diameter, the Schilke 52E2 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
Schilke 52E2
• Trombone
Cup diameter25.91 mm / 1.0201 in
Cup depthVery deep
Rim width—
Throat diameter—
BackboreJ.277
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Schilke 52E2 has a cup diameter of 25.91 mm / 1.0201 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.41 mm / 0.0555 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 52E2 has a very 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.