Bach 12E vs Bruno Tilz 305-T 1
The Bach 12E has a wider cup diameter, the Bruno Tilz 305-T 1 features a deeper cup, the Bach 12E has a larger throat opening.
Cup Diameter
The Bach 12E has a cup diameter of 24.50 mm / 0.9646 in compared to 24.00 mm / 0.9449 in on the Bruno Tilz 305-T 1 — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 305-T 1 has a deep cup while the Bach 12E has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 12E has a wider throat (5.85 mm / 0.2303 in vs 5.00 mm / 0.1969 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.
Compare Bach 12E with others
Compare Bruno Tilz 305-T 1 with others
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