Bach 1G vs Bruno Tilz 215-3 B
the Bach 1G features a deeper cup, the Bach 1G has a larger throat opening.
Mouthpiece A
Bach 1G
• Trombone
Cup diameter28.00 mm / 1.1024 in
Cup depthVery deep
Rim width—
Throat diameter8.10 mm / 0.3189 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
Bruno Tilz 215-3 B
• Trombone
CatalogCup diameter28.00 mm / 1.1024 in
Cup depthDeep
Rim width—
Throat diameter7.40 mm / 0.2913 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 28.00 mm / 1.1024 in.
Cup Depth
The Bach 1G has a very deep cup while the Bruno Tilz 215-3 B has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 1G has a wider throat (8.10 mm / 0.3189 in vs 7.40 mm / 0.2913 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.