Description
If you’ve ever torn into a control cavity to wire up a new preamp only to spend more time troubleshooting than playing, this harness is the fix. Bartolini pre-wires the HR4.7/918 preamp and pairs it with premium-feel pots so you can swap it into your bass and get back to the music, not the multimeter.
Bartolini has spent decades earning its reputation among luthiers and players who care about tone that translates on stage and in the studio. Every component here is built in San Luis Obispo, California, with the same attention to detail that’s made their pickups and electronics a go-to for bassists chasing a specific voice rather than a generic one. Pro Audio Land has carried Bartolini gear for years, so you’re getting the real deal from an authorized dealer.
The HR4.7/918 runs on a 3-band EQ layout that gives you real sculpting power at the fingertips. Volume and blend share two control holes, while treble/bass are stacked with mid on a separate control across three holes — plus a 3-frequency toggle switch so you can dial in exactly where your mids sit, whether you’re going for punch, growl, or something scooped and modern.
- 3-band EQ and preamp, pre-wired and ready to install
- Two-hole Volume – Blend control
- Three-hole Treble/Bass stack – Mid control with 3-frequency toggle switch
- Includes a second battery clip for 18V operation, wiring instructions, and black ring & center knobs for the tone stack
Whether you’re upgrading a passive bass or replacing a worn preamp, this harness gets you gig-ready tone control without the guesswork.









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