Bach 1½GM vs Denis Wick 1AL
The Denis Wick 1AL has a wider cup diameter, the Bach 1½GM has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 1½GM
• Trombone
Cup diameter27.00 mm / 1.0630 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Denis Wick 1AL
• Trombone
Cup diameter27.11 mm / 1.0673 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Denis Wick 1AL has a cup diameter of 27.11 mm / 1.0673 in compared to 27.00 mm / 1.0630 in on the Bach 1½GM — a difference of 0.11 mm / 0.0043 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.