4-string · Bolt-On with Scarf Joint
Active Bass Boost Circuit, Unique Jackson 2x2 headstock, Poplar body with large upper horn evenly distributes weight throughout the instrument, providing perfect balance by reducing neck dive for hours of comfortable playing, bolt-on maple neck with scarf joint design provides rock-solid reliability, the speed neck contour and 12 radius laurel fingerboard with 24 frets make for lightning-fast playability, the Spectra Bass JS2 provides a sound that is as unique as the bassist playing it.
| Construction | Bolt-On with Scarf Joint |
| Strings | 4 |
| Body | Poplar |
| Neck | Maple |
| Fingerboard | Laurel |
| Neck Pickup | Jackson® P-Style Pickup |
| Bridge Pickup | Jackson® J-Style Pickup |
| Controls | Volume (Push/Pull Selector for Active/Passive Options), Blend, Bass Boost (active only) |
| Bridge | Jackson® Hardtail |
Artists documented playing the Jackson JS Series Spectra Bass JS2: Evan Seinfeld, Milkie Way, Rick Savage.