Giardinelli Sym. T vs Yamaha BL-58L
The Yamaha BL-58L has a wider cup diameter, the Giardinelli Sym. T features a deeper cup, the Yamaha BL-58L has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Giardinelli Sym. T
• Trombone
Cup diameter25.80 mm / 1.0157 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha BL-58L
• Trombone
Cup diameter26.84 mm / 1.0567 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha BL-58L has a cup diameter of 26.84 mm / 1.0567 in compared to 25.80 mm / 1.0157 in on the Giardinelli Sym. T — a difference of 1.04 mm / 0.0409 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.