4-string · Bolt-On with Scarf Joint
Offset body style, Poplar body with poplar burl top, 12 radius laurel fingerboard, 24 jumbo frets, Jackson J-style bridge pickup and P-style neck pickup, blend, bass boost and volume controls, active circuit, 2x2 black headstock with an understated J logo, Black Burst or Blue Burst finish with black hardware
| Construction | Bolt-On with Scarf Joint |
| Strings | 4 |
| Body | Poplar, Poplar Burl |
| 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 JS2P: Evan Seinfeld, Rick Savage.