PRS Double Acting Truss Rod Adjustment
The PRS double acting truss rod provides neck adjustment in both directions. Conventional truss rods can only compensate for forward neck bow. Due to varied climate and other conditions to which your PRS guitar may be exposed during its lifetime, we have made our necks fully adjustable. PRS switched over to the double acting truss rod about halfway through the 1992 production year.
To determine whether your guitar has this system simply examine the adjusting nut. The single acting rods used a brass adjusting nut threaded onto a steel rod. The double acting rods use a steel nut fused to a steel rod. Neck adjustment can be accomplished as before except that a reverse bow can now be fully corrected. The double acting truss rod achieves twice the amount of adjustment as the single acting rod with the same amount of movement of the adjusting nut. Do not over-adjust!