Bach 7 vs Schilke 46
The Bach 7 has a wider cup diameter, the Schilke 46 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 7
• Trombone
Cup diameter24.75 mm / 0.9744 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 46
• Trombone
Cup diameter24.54 mm / 0.9661 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 7 has a cup diameter of 24.75 mm / 0.9744 in compared to 24.54 mm / 0.9661 in on the Schilke 46 — a difference of 0.21 mm / 0.0083 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.