Bach 6½AL (large shank) vs Schilke 50
the Bach 6½AL (large shank) features a deeper cup, the Schilke 50 has a larger throat opening.
Mouthpiece A
Bach 6½AL (large shank)
• Trombone
Cup diameter25.40 mm / 1.0000 in
Cup depthDeep
Rim width—
Throat diameter6.63 mm / 0.2610 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 50
• Trombone
Cup diameter25.40 mm / 1.0000 in
Cup depthMedium
Rim width—
Throat diameter6.75 mm / 0.2657 in
Backbore17/64 .2656"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 25.40 mm / 1.0000 in.
Cup Depth
The Bach 6½AL (large shank) has a deep cup while the Schilke 50 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke 50 has a wider throat (6.75 mm / 0.2657 in vs 6.63 mm / 0.2610 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.