New Ernie Ball Music Man JP15 in stock! The JP15 is the first John Petrucci production model to feature a roasted maple fretboard and roasted maple top. The African mahogany body features a Sahara Burst satin finish and a pair of DiMarzio Illuminator humbuckers. The roasted, figured maple neck is finished in gunstock oil and wax. Piezo, 20 dB gain boost and custom pearl JP15 inlays come stock on every JP15.