Description
The M442J takes Bartolini’s beloved 9J passive, hum-cancelling Jazz bass coil and doubles up, mounting a pair of them inside a squared soapbar housing instead of the usual eared J shell. The result is the 2J Squared: a quad-coil pickup that behaves like a dual humbucker and a classic Jazz bass pickup depending on how you wire it.
- Series wiring: big, growly, high-output humbucker tone
- Parallel wiring: fat, round, but focused u2013 like running both J-bass volumes wide open
- Coil-cut wiring: precise, clear single-coil character
Every one of these modes stays completely hum-free, and you can wire in a toggle switch to flip between them on the fly. No switch is required if you just want to pick one voice and commit, but the flexibility is worth the extra wiring if you’re building a do-it-all bass.
Because the 2J Squared uses blades rather than individual pole pieces, string spacing isn’t a concern u2013 it’ll track cleanly across a range of setups. The coils are internally shielded and wired with shielded cable, so these hold up as fully hum-killing pro pickups even under noisy stage lighting or in electrically dirty studio rooms. They’re also built sweat-proof and won’t produce string-strike noise.
Bartolini builds these in matched neck (Bass, -B) and bridge (Treble, -T) versions, voiced to sit together in balance whether you’re blending both or soloing one at a time.
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