Option D: Volume/Depth - Blend - ToneStyler
Option D: Stacked Master Volume/Depth - Blend - ToneStyler
Stellartone Jazz Bass Wiring Diagram D - 2.8 MB
For three-knob volume-volume-tone basses (J-Bass style)
Blend Pot Wiring Closeup
Blend Pot Wiring Closeup - 1.3 MB
For general purpose wiring of typical mono blend pots
Option D: Page one shows the original Fender Jazz Bass wiring. Page two shows the original 250kΩ neck pickup volume pot replaced with a stacked-knob dual-concentric master volume/depth pot; the original 250kΩ bridge pickup volume pot is replaced with a 500kΩ/500kΩ mono blend pot; the original 250kΩ "master" tone pot is replaced with a ToneStyler.
Open the PDF in full-page view, and use your mouse wheel or page buttons to "flip" back and forth to compare the easy "before" and "after" wiring. For a clear close-up view of all wiring details, zoom in to the 100% - 400% image size range.
The stacked volume/depth control allows a fourth control in the space of three. The inner knob is the new master volume; the outer ring is the new "tone depth" knob, which adjusts the strength of the selected ToneStyler EQ contours and the treble balance.
The tone depth pot and the ToneStyler are linked together, creating a "mega tone pot". For example, to duplicate a standard tone pot, select a standard tone cap value using the ToneStyler, then adjust the ring knob in the usual manner. Select a higher resonant frequency circuit, and the standard tone pot becomes a mid-range control!
There are several sonic and performance advantages when converting the dual-volume J-bass to a master volume control plan:
• Fender's original signal flow error resulting from connecting a "master" tone pot to post-volume signals is remedied
• The blend pot allows the player's preferred balance between neck & bridge pickup levels to be exactly maintained, independent of volume adjustments
• A single-circuit tone control will be properly-connected to one or both pickup outputs at all times, at the ideal "pre-volume" 100% signal level provided at the mono blend pot's output
Using your new blend pot: turn knob to full-clockwise for maximum volume on soloed neck pickup; turn knob to full-anti-clockwise for maximum volume on soloed bridge pickup; turn knob to the center detent notch for maximum volume on both pickups mixed together. If the soloed bridge pickup is preferred upon full-clockwise blend knob rotation, just swap the two pickup hot wires on the blend pot.