The JS240PS features an American basswood body bolted to a titanium reinforced maple and purpleheart neck with a 24-fret panga panga fingerboard with white dot position markers. Components include a DiMarzio Satchur8 humbucker at the bridge, an Edge double locking tremolo bridge and Ibanez die-cast tuning machines.
The defining feature of this model is the Sustainiac driver neck pickup. The Sustainiac feature is controlled by a push-pull on/off switch on the tone control as well as a 3-way toggle with three settings: harmonic, normal or mixed. Additionally the volume control has a push-pull switch which activates a high-pass filter.
The JS240PS replaced the JS24P which lacked the Sustainiac, but was otherwise similar.