Giardinelli 3M vs Giardinelli 4M
The Giardinelli 3M has a wider cup diameter.
Mouthpiece A
Giardinelli 3M
• Baritone / Euphonium
Cup diameter26.30 mm / 1.0354 in
Cup depthMedium
Rim width—
Throat diameter6.40 mm / 0.2520 in
Backbore1/4" (.250)
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 4M
• Baritone / Euphonium
Cup diameter25.40 mm / 1.0000 in
Cup depthMedium
Rim width—
Throat diameter6.40 mm / 0.2520 in
Backbore1/4" (.250)
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Giardinelli 3M has a cup diameter of 26.30 mm / 1.0354 in compared to 25.40 mm / 1.0000 in on the Giardinelli 4M — a difference of 0.90 mm / 0.0354 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 6.40 mm / 0.2520 in, so resistance feel will be comparable.
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.