Bach 4C vs Giardinelli 4M
The Bach 4C has a wider cup diameter, the Giardinelli 4M features a deeper cup, the Giardinelli 4M has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 4C
• Baritone / Euphonium
Throat diameter5.85 mm / 0.2303 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 4M
• Baritone / Euphonium
Throat diameter6.40 mm / 0.2520 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Giardinelli 4M has a wider throat (6.40 mm / 0.2520 in vs 5.85 mm / 0.2303 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.