All harnesses are hand crafted and expertly soldered, and usually ship the next day.

This pre-wired upgrade kit will greatly improve the tone of your J Bass. Fits any Fender J-Bass or J- Bass Copy 

Wiring diagram and email support (if needed) is included. 

Install your pre-wired pickups and you're good to go!

What is Treble Bleed?

When you turn down the volume on your Bass you are also turning the tone down resulting in “muddy tone”.

A resistor capacitor network “treble bleed” is added to the input and output of the volume control to keep the highs from leaving your tone as the volume is decreased.  
Adding this circuit helps to avoid the "muddy-tone" syndrome.  

Harness Includes:

(3)  Bourns 250K Ohm Vintage-Style Potentiometers. 

Short-Solid Shaft - Audio Taper, Aluminum bushing and shaft, Long Life Carbon Element. Designed for use in all guitars. Each pot comes with nut and finish washer.

(1)  Orangedrop  .047uf / Tone Capacitor for a smooth warm 50's Tone

(1)  Switchcraft 2 Conductor, Mono 1/4" Output Jack 

Black and white Vintage style 22awg cloth push back wire.

 Standard Potentiometer Specifications

• 1/4″ .25mm Solid Shaft,  3/8″ .310mm Bushing Width, 3/8″ .310mm  Bushing Length
• Pot Size = 15/16 " .945mm  " Height 27.0mm
• Shaft Diameter = 1/4"
• Shaft Length = 3/8 "
• Hole size requirement = 3/8 " 
• Value = 250K Ohms