Description
If you’ve ever torn your bass apart to rewire a preamp and ended up with a mess of loose grounds and cold joints, this harness is the fix. Bartolini’s HR3.4/918 comes fully pre-wired with their 3-band active preamp and premium pots, so you can pull your old electronics, drop this in, and get back to actually playing instead of troubleshooting a soldering iron burn on your thumb.
Tone-wise, this is the setup for players who want real shaping power without a control cavity full of knobs. One hole handles your Neck Volume/Bridge Volume stack, letting you blend pickups with a single push-pull motion. The second control stacks Treble and Bass, while a third handles Mid, and both frequency selections are accessible via push-pull switches — so you can dial in a scooped slap tone or a fat, mid-forward growl depending on the gig without ever touching a screwdriver.
Runs on 9V or 18V, and the higher voltage option gives you more headroom before clipping, which matters if you dig in hard or run hot pickups. Bartolini builds everything in San Luis Obispo, USA, and their preamps have been the quiet backbone of countless bass tones for decades — this harness brings that same reliability to your build or repair.
- 3-band EQ and active preamp
- Neck Volume/Bridge Volume stack (1 hole)
- Treble/Bass stack and Mid control with 2-frequency push-pull (2 holes)
- 9V or 18V operation
- Includes 2nd battery clip for 18V wiring, wiring instructions, and black ring/center knobs for the tone stack
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