Bach 4G vs Bruno Tilz 306-4 G
The Bach 4G has a wider cup diameter, the Bach 4G features a deeper cup, the Bach 4G has a larger throat opening.
Cup Diameter
The Bach 4G has a cup diameter of 26.00 mm compared to 25.50 mm on the Bruno Tilz 306-4 G — a difference of +0.50 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 4G has a very deep cup while the Bruno Tilz 306-4 G has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 4G has a wider throat (7.01 mm vs 6.80 mm). 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.
Compare Bach 4G with others
Compare Bruno Tilz 306-4 G with others
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