Bach 15 vs Giardinelli 5M
The Giardinelli 5M has a wider cup diameter, the Bach 15 features a deeper cup, the Giardinelli 5M has a larger throat opening.
Cup Diameter
The Giardinelli 5M has a cup diameter of 25.00 mm compared to 24.40 mm on the Bach 15 — a difference of +0.60 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 15 has a deep cup while the Giardinelli 5M has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Giardinelli 5M has a wider throat (6.00 mm vs 5.85 mm). 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.