Description
Skip the soldering headaches and get straight to shaping your low end. This Bartolini HR5.2/918 harness arrives fully wired with Bartolini’s respected preamp electronics and smooth, road-worthy potentiometers, built for players who’d rather spend time on tone than tangled wires. Bartolini has been the go-to name in bass electronics for decades, hand-built in San Luis Obispo, California, and used by luthiers and players worldwide who demand real low-end character and clarity that holds up on stage and in the studio.
The HR5.2/918 runs a versatile 3-band EQ setup, giving you independent control over bass, mid, and treble so you can dial in everything from a fat, rounded thump to an aggressive slap tone. The mid control includes a 2-frequency push-pull switch, letting you shift the midrange sweep on the fly to match different songs, pickups, or rooms. Volume and blend controls sit on their own pair of holes, keeping your control layout clean and intuitive.
- 3-band EQ with active preamp circuitry
- Volume – Blend controls (2 pot holes)
- Treble – Mid (with 2-frequency push-pull) – Bass tone controls (3 pot holes)
- Runs on 9V or 18V power
- Includes second battery clip for 18V setup and wiring instructions
Whether you’re upgrading a workhorse bass or finishing a custom build, this harness drops in with minimal fuss and gives you the flexible, punchy foundation Bartolini electronics are known for.








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