Bach Mega Tone Trombone 6½A vs Schilke 53
The Schilke 53 has a wider cup diameter, the Bach Mega Tone Trombone 6½A features a deeper cup, the Schilke 53 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach Mega Tone Trombone 6½A
• Trombone
Cup diameter25.40 mm / 1.0000 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 53
• Trombone
Cup diameter26.24 mm / 1.0331 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Schilke 53 has a cup diameter of 26.24 mm / 1.0331 in compared to 25.40 mm / 1.0000 in on the Bach Mega Tone Trombone 6½A — a difference of 0.84 mm / 0.0331 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.