I've never understood why that's a common dead spot (or at least a tough one for octavers) on many basses. Can anyone explain, or point me at an explanation somewhere else if it's considered off-topic here.
Googling "deadspot 5th fret bass" will produce many hits, including TalkBass threads, on the issue of that accursed dead spot, which is reportedly a frequency cancellation effect that occurs in necks of many fender-style basses. (I was among those who tried out the "Fat Finger," the chrome clamp that adds mass to the neck, which helped the dead spot, but also altered the tone and balance of the rest of the bass in other ways that ultimately didn't work for me.)
Octavers don't track such dead spots well because of the quick decay and lack of a solid fundamental.
