The bass has strong string tension, so it can be said that the neck condition is more likely to change than on a guitar. In order to correct the bowing of the neck, the guitar and the bass have a metal rod called a truss rod. Here we will introduce how to adjust the neck with a truss rod!
There is tapping method to check the condition of a rough neck. This is an ideal situation if you hold the 1st fret of the tuned bass and the final fret, hit around the 12th fret, and there is a slight gap. If there is a clear gap that can be seen visually, there is a possibility that the neck is warped forward, and if there is no gap at all, it is a reverse warp.
A state in which the neck is bent in a bow toward the strings caused by the tension of the strings. If the symptoms are severe, the string height will be abnormally high.
A state in which the neck bends in the opposite direction away from the strings. Note buzzing occurs at the lower positions.
When actually adjusting the truss rod, loosen the strings and then turn the truss rod with an Allen wrench or screwdriver. At first, turn about a quarter turn and adjust while checking the condition.
There are types with wrench holes open near the head and types to adjust by removing the neck, so check the type of bass you have on hand.
Tighten the rod clockwise.
Loosen the rod counterclockwise.
In fact, it may be forward warped, reverse warped, entangled, wavy or twisted. You need experience to be able to make an accurate decision, so you cannot force the truss rod. If the problem is not solved with a little adjustment, please consult a guitar repair shop.
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