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I was looking online at a Guild F-512 and noticed that it said that it has a "dual-action" truss rod. What does dual-action mean? Someone told me that some Guilds have 2 truss rods. Is that true?
In more recent years, Guild abandoned the twin compression rods in their 12 strings in favor of a single, dual-action truss rod.
I am unaware of any 12 strings having two dual-action truss rods. I would think that such an implementation would be uncomfortably heavy, heavier than their compression rod ancestors.
CLUE: If you can remove a nut from the end of a rod, it is *not* a dual-action truss rod. It is, in fact, a compression rod. I hope that helps.
Stopped dual rods in Tacoma 12-strings ca '06, replaced with a single dual action rod with 2 flanking graphite bars for enhanced stability.
Change was never documented on spec sheet so only way to tell if a Tacoma has 2 rods is to check under TRC.
New Hartford continued that system and suspect Cordoba will as well.
I thought it was exclusive to the 12-strings.I think I remember reading about the carbon rods. Just in the 12-strings or all guitars?
While I don't know if Guild ever did, I have constructed 6 string necks for years with a single, dual-action truss rod down the center having twin parallel carbon fiber stiffeners alongside. And I know I am not alone. The carbon fiber bars are less than half the depth of the dual-action truss rod. They fit just fine, can be lighter than the wood they replace, and add significant torsional strength to the neck. But they cost more than wood. ;~}Not sure if it [carbon fiber] would even fit in a 6-string width neck and probably not needed.
It wasn't the depth so much as how far they were from the truss horizontallyfrom the perspective of the photos.While I don't know if Guild ever did, I have constructed 6 string necks for years with a single, dual-action truss rod down the center having twin parallel carbon fiber stiffeners alongside. And I know I am not alone. The carbon fiber bars are less than half the depth of the dual-action truss rod....But they cost more than wood. ;~}