Custom DiMarzio humbuckers and an improved neck.
The Music Man John Petrucci JPX 6 electric guitar has a thermally-treated roasted neck that not only looks great but adds dimensional stability and resistance to temperature, humidity changes and warping. It has reduced density while maintaining stiffness for a lighter neck with sufficient strength. The roasted neck offers increased resonance, less damping, and clearer tone. The heating process also gives a microstructure similar to naturally aged woods with lower moisture content and eliminates the need for hazardous chemical treatments.
The Music Man John Petrucci 6-String Electric Guitar has the roasted maple neck featuring an adjustable truss rod and 5-bolt mounting to the basswood body for perfect alignment and no slipping. A sculpted neck joint allows free access to upper frets. The Petrucci 6 guitar's ebony fretboard has 24 wide, high-profile frets. Schaller locking tuners and custom John Petrucci tremolo complete the hardware. Its 2 Custom DiMarzio humbucking pickups were specially designed for Petrucci.