How high should classical guitar action be?
What is the correct action for a classical guitar? There seems to be an unofficial standard evolving on this. Action is measured as the distance between the frets and the strings. Specifically, the distance is measured at the 12th fret from its top to the bottom of a given string.
An action of 3mm at the first string (top E) between the string’s bottom and the top of the 12th fret is considered normal. And an action of 4mm at the sixth string (bottom E) is considered normal – with the strings in between having values between 3 mm and 4 mm progressively.
These figures may vary up or down slightly but no more than 0.5mm. A difference of 1 mm is generally considered advisable between the bass and trebles.
Some experts suggest taking another set of similar measurements at the first fret. The action numbers here will be really low:
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