Description
If your P- or J-bass is stuck with passive tone and you don’t want to start cutting up the body, the Blackouts 2-band preamp solves that problem cleanly. It’s built to drop into existing routing, giving you onboard active EQ without any drilling or major surgery to your instrument.
- 2-band active EQ design for shaping bass and treble independently
- Stacked bass/treble control pot keeps both knobs on one shaft, saving panel space
- Switchable treble frequency lets you dial in where the top end bites — from snappy and cutting to warmer and rounder
- Drop-in installation for P- or J-style basses, no drilling required
What makes this preamp worth a look is the flexibility of that switchable treble frequency. Rather than being locked into one voice, you can adjust where the high-end control actually engages, which means you can chase a growling low-mid punch for a fingerstyle groove or open things up for a brighter slap tone, all from the same knob layout. Combined with the separate bass boost/cut, you get a genuinely active voice on tap — more headroom, more push against a busy mix, and the ability to compensate for room acoustics or amp coloration on the fly at a gig.
For bassists running passive P or J basses who want active tone flexibility without reshaping their instrument, the Blackouts preamp is a straightforward, practical upgrade.






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