4-string · Bolt-On with Scarf Joint
Offset body shape with larger upper horn, Active three-band EQ, 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, speed neck contour, 12-16 compound radius laurel fingerboard and 24 frets make for lightning-fast playability, The Spectra Bass JS3 provides a sound that is as unique as the bassist playing it, dual passive Jackson medium-output humbucking pickups create a monstrous low-end growl, HiMass™ bridge provides enhanced stability, improved sustain and bolder tone, Tone can be further refined and tweaked with a two-way toggle switch for pickup coil splitting, 3-band EQ (active only), blend control and volume control (with push/pull selector to bypass or engage the active circuit for the 3-band EQ). With the push/pull selector, you'll never have to fear a battery running out and losing sound. A quick pull on the volume knob will bypass the active circuit, making it easy to regain sound from the bass without the use of battery power. 4-string, 34-scale Spectra Bass JS3 comes dressed in Gloss Black, Indigo Blue, Metallic Red, Silverburst or Snow White finishes with a unique Jackson 2x2 black headstock with an understated J logo. The Snow White finish comes with gold hardware, while the other finishes feature black nickel hardware
| Construction | Bolt-On with Scarf Joint |
| Strings | 4 |
| Body | Poplar |
| Neck | Maple |
| Fingerboard | Laurel |
| Neck Pickup | Jackson® Medium-Output Humbucking |
| Bridge Pickup | Jackson® Medium-Output Humbucking |
| Controls | Volume (Push/Pull Selector for Active/Passive Options), Blend, 3-Band EQ (Active Only) |
| Bridge | Jackson® HiMass™ |