Description
Soldering a preamp harness into your bass yourself is doable, but it eats up an afternoon and leaves plenty of room for cold joints and hum. The Bartolini HR-4.7AP/918 skips all that — it arrives fully assembled and ready to drop into your control cavity, wired with Bartolini’s own preamp and quality pots that’ll hold up to years of stage and studio use.
What sets this harness apart is the active/passive push-pull built into the Volume knob. Dial in Bartolini’s punchy 3-band voicing when you want it, or pull the knob and go straight passive if your amp or your ears call for it — no rewiring, no tech visit, just a flick mid-set. Runs on 9 or 18 volts, and the extra headroom of 18V setups tends to open up the low end with more clarity when you’re pushing hard-hitting basslines through a full rig.
Layout breakdown:
- Volume (with Active/Passive push-pull switch) and Blend — two control holes
- Treble/Bass Stack, Mid (with 3-frequency toggle switch), and Bass — three control holes
Specs at a glance:
- EQ: 3-band
- Volume controls: Volume (Active/Passive push-pull) — Blend
- Tone controls: Treble/Bass Stack — Mid (+3-freq toggle) — Bass
- Includes: 2nd battery clip for 18V operation, wiring instructions, black ring and center knobs for the tone stack
Made in San Luis Obispo, California, and built entirely in the USA — Bartolini’s reputation with luthiers and gigging bassists alike comes down to consistency like this. Pro Audio Land has carried Bartolini electronics as an authorized dealer for years, so you’re getting the real thing, ready to install.
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