Bach 5G (small shank) vs Bach 5GS (small shank)
the Bach 5G (small shank) features a deeper cup, the Bach 5G (small shank) has a larger throat opening.
Mouthpiece A
Bach 5G (small shank)
• Baritone / Euphonium
Cup diameter25.50 mm / 1.0039 in
Cup depthVery deep
Rim width—
Throat diameter7.00 mm / 0.2756 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
Bach 5GS (small shank)
• Baritone / Euphonium
Cup diameter25.50 mm / 1.0039 in
Cup depthDeep
Rim width—
Throat diameter6.63 mm / 0.2610 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 25.50 mm / 1.0039 in.
Cup Depth
The Bach 5G (small shank) has a very deep cup while the Bach 5GS (small shank) has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 5G (small shank) has a wider throat (7.00 mm / 0.2756 in vs 6.63 mm / 0.2610 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.