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Too low and a loss of sustain and output is likely. Another is that humbuckers need to be set level in order for for them to cancel out the hum properly. NECK ADJUSTMENT This adjustment is done first over any others and must be done for proper action, intonation and fretting. This is done with strings tuned to pitch. Fret instrument at 1st fret and at body/neck joint. The space between the top of the 8th fret and bottom of the string should be .020 or whatever you are comfortable with. Neck a