Bach 6½AL (small shank) vs Bach Mega Tone Bass 4G
The Bach Mega Tone Bass 4G has a wider cup diameter, the Bach Mega Tone Bass 4G features a deeper cup, the Bach Mega Tone Bass 4G has a larger throat opening.
Cup Diameter
The Bach Mega Tone Bass 4G has a cup diameter of 26.00 mm compared to 25.40 mm on the Bach 6½AL (small shank) — a difference of +0.60 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach Mega Tone Bass 4G has a very deep cup while the Bach 6½AL (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 Mega Tone Bass 4G has a wider throat (7.04 mm vs 6.63 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 6½AL (small shank) with others
Compare Bach Mega Tone Bass 4G with others
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