Bach 12 vs Giardinelli 6M
the Bach 12 features a deeper cup, the Bach 12 has a larger throat opening.
Mouthpiece A
Bach 12
• Baritone / Euphonium
Cup diameter24.50 mm / 0.9646 in
Cup depthDeep
Rim width—
Throat diameter5.85 mm / 0.2303 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 6M
• Baritone / Euphonium
Cup diameter24.50 mm / 0.9646 in
Cup depthMedium
Rim width—
Throat diameter5.75 mm / 0.2264 in
Backbore.228"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 24.50 mm / 0.9646 in.
Cup Depth
The Bach 12 has a deep cup while the Giardinelli 6M has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 12 has a wider throat (5.85 mm / 0.2303 in vs 5.75 mm / 0.2264 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.