Bruno Tilz 211-B 4 vs Bruno Tilz 211-S 3
the Bruno Tilz 211-S 3 features a deeper cup, the Bruno Tilz 211-B 4 has a larger throat opening.
Mouthpiece A
Bruno Tilz 211-B 4
• French Horn
CatalogCup diameter17.50 mm / 0.6890 in
Cup depthMedium
Rim width—
Throat diameter4.00 mm / 0.1575 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 211-S 3
• French Horn
CatalogCup diameter17.50 mm / 0.6890 in
Cup depthDeep
Rim width—
Throat diameter3.80 mm / 0.1496 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 17.50 mm / 0.6890 in.
Cup Depth
The Bruno Tilz 211-S 3 has a deep cup while the Bruno Tilz 211-B 4 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bruno Tilz 211-B 4 has a wider throat (4.00 mm / 0.1575 in vs 3.80 mm / 0.1496 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.