The stiffening bars installed on either side of the truss rod in super bass necks enhance stability and add mass which helps to eliminate dead spots.
Graphite truss rod.
I would tend to think that they build graphite necks alot less rigid these days so that a truss rod could actually move the neck.
Anybody who has an old modulus zon or musicman cutlass without a truss rod please comment on how straight the neck has stayed over the years.
Both the double expanding truss rods and the graphite rods will affect tone bad or worse is subjective.
Graphite truss rod manufacturers factory suppliers from china let s cooperate hand in hand to jointly make a beautiful future.
Personally i don t need the weight or the added stability where i live the single rod necks are very stable so i have only one neck with double expanding truss rod.
Some are non adjustable but most modern truss rods have a nut at one or both ends that adjusts its tension.
The truss rod is component of a guitar or other stringed instruments that stabilizes the lengthwise forward curvature also called relief of the neck usually it is a steel bar or rod that runs inside the neck beneath the fingerboard.
Graphite bars are also available for an additional 60.
Our graphite bars are over sized for steel like rigidity with less weight and exhibit a warmer tone.