Bach 1¼GM vs Schilke 45B
The Bach 1¼GM has a wider cup diameter, the Bach 1¼GM features a deeper cup, the Bach 1¼GM has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 1¼GM
• Trombone
Throat diameter8.10 mm / 0.3189 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 45B
• Trombone
Throat diameter5.95 mm / 0.2343 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Bach 1¼GM has a wider throat (8.10 mm / 0.3189 in vs 5.95 mm / 0.2343 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.
Compare Bach 1¼GM with others
Compare Schilke 45B with others
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