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Series Parallel Loom for Jazz bass with Varitone

Have you ever wondered whether you can get more out of your single coil pickups on your bass guitar. This modification, which was inspired by the Seymour Duncan schematic shown above allows you to select:

Solo Bridge pickup

Bridge and Neck pickups (standard parallel wiring) slightly scooped sounding

Solo Neck pickup

but also

Bridge and Neck pickups (series wiring) this position turns both pickups into one massive Humbucker. Result: increased output with a boost in mid range taking away the sharpness in treble. Please note in Series mode (where the knob is pulled out) ooer Missus... it then acts as main volume.

This is the base model with mylar capacitor.


This loom only works with single coil pickups (Jazz style) or split P (Precision style)

The surrounding cardboard frame which the loom arrives in may not always resemble the one in the pictures...



Series Parallel Loom for Jazz bass with Varitone

A reverse view image:

Series Parallel Loom for Jazz bass with Varitone reverse view

Wiring diagram:

Jazz Bass With Series Parallel Switch Wiring Diagram