I use low action and fret buzz is not an issue. Even people who prefer higher action don't get fret buzz on my basses. Add "the bass" to the list of things it depends on...

How low? On my sixes with ramps I barely have 1mm at the ramp when the highest note is fretted on the C string.
How low? On my sixes with ramps I barely have 1mm at the ramp when the highest note is fretted on the C string.
