Description
Wiring a preamp from scratch eats an afternoon and usually a fingertip. The Bartolini HR5.2AP/918 harness hands you the whole circuit pre-assembled, so you’re bolting in tone rather than chasing cold solder joints. It’s built around Bartolini’s own 3-band EQ and preamp electronics paired with audio-grade potentiometers chosen for smooth, consistent sweep over the long haul.
What makes this particular harness worth the upgrade is the active/passive switching baked into the Volume control itself. Pull up on that pot and you bypass the electronics entirely, giving you a raw passive tone as a backup if a battery dies mid-gig or you just want that unbuffered growl. The Mid control gets the same push-pull treatment, letting you toggle between two frequency centers so you can dial in exactly where the midrange should sit for your instrument and playing style.
Control layout is straightforward once installed: two knob positions handle Volume (with the Active/Passive pull) and Blend, while three more cover Treble, Mid (with its 2-frequency pull switch), and Bass. The 918 in the name signals dual voltage flexibility — run it on 9V or step up to 18V headroom for lower noise and more dynamic range, and Bartolini includes the second battery clip needed for that 18V setup.
Every part is designed and built in San Luis Obispo, California, where Bartolini has spent decades supplying pickups and electronics to luthiers and repair shops worldwide. Wiring instructions are included, and Pro Audio Land has carried Bartolini’s full line for years as an authorized dealer.
- 3-band EQ with active/passive push-pull Volume
- Blend, Treble, Bass, and dual-frequency push-pull Mid controls
- 9V/18V compatible — second battery clip included for 18V operation
- Premium audio-quality potentiometers, 100% USA made
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