Description
Rewiring a preamp under a gig deadline is nobody’s idea of fun. Bartolini’s HR5.4AP/918 harness skips that headache entirely — every pot, switch, and connection is already assembled and ready to mount, so you’re soldering leads to pickups and jacks, not chasing a wiring diagram at 11pm.
Tone-wise, this is Bartolini’s 3-band EQ paired with their trusted preamp electronics, giving you real control over how your low end sits in a mix. The active/passive push-pull switch built into the Volume knob means you’re never stuck if a battery dies mid-set — flip to passive and keep playing. A separate Blend knob lets you balance pickups, while the Treble/Mid/Bass tone section includes a 3-frequency toggle switch on the Mid control for dialing in exactly where your midrange punches through.
This harness runs on 9V or 18V power, and the 18V option is covered — a second battery clip is included right in the box along with wiring instructions to walk you through the install.
- 3-band EQ with active preamp electronics
- Two-hole Volume section: Volume (active/passive push-pull) — Blend
- Four-hole Tone section: Treble — Mid (with 3-frequency toggle switch) — Bass
- 9V/18V switchable operation
- Includes second battery clip for 18V setup and wiring instructions
Bartolini builds everything in San Luis Obispo, California, and has been the go-to name in bass electronics for luthiers and players who care about real tone over gimmicks. Pro Audio Land has carried their gear for years as an authorized dealer, so you’re getting genuine Bartolini parts backed by people who actually know bass.
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