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Going from active to passive, need ideas for the five holes in my top

Discussion in 'Pickups & Electronics [BG]' started by Dec1975, Feb 17, 2017.

  1. Dec1975


    Aug 30, 2006
    Cedar Park, TX
    I have a rear-routed Warmoth Jazz bass. It is currently using SD Ultra Jazz pickups and an Audere pre-amp. In total, there are five holes in the top of the bass for the Audere controls. I'm really more of a passive guy, and want to pull that pre-amp out. How would you re-wire it and still use all of the control holes? I was thinking LP style- 2 vol, 2 tone, three-way switch. I'd like to keep it as simple as possible.
  2. Two tones on a bass is fairly impractical, because they will either interact, or you will have to make compromises to get them to work independently. If if were my bass, then I would go for two volumes, a master tone, a rotary switch to select the capacitance, and a pickup selector switch. Alternatively, two volumes, bass and treble cuts, and a pickup selector switch.
    NoiseNinja likes this.
  3. Dec1975


    Aug 30, 2006
    Cedar Park, TX
    Thanks for the input. Two volumes with bass and treble cuts sounds like a good idea.

    I seem to recall Fender made a Jazz 24-fret, which had similar rear-routing and top holes. Maybe I can find a diagram for that and see how they did it.
  4. To my knowledge, Fender has never done such a scheme on any instrument.

    What you want is the G&L diagram, plus a pickup selector. From a quick Google search, this suffices, although the tone control is wired backwards, for some reason. Swap the first and third terminals on the tone pot, and it will behave nicely.
    Clark Dark, Will_White and Dec1975 like this.
  5. ahc


    Jul 31, 2009
    No. Virginia
    You might also want to think about a series/parallel switch. Something like V/V/master tone/pup selector/sp switch.
    NoiseNinja likes this.
  6. Dec1975


    Aug 30, 2006
    Cedar Park, TX
    Awesome! That looks like a great idea. Time to order some parts.

    By the way, I did find the Fender Jazz 24- they were active basses, and nothing like what I was looking for.
  7. fermata


    Nov 10, 2015
    Mountain West
    I considered the G&L bass cut circuit on my passified Thingray, but I decided against it--it probably makes sense on the L1000 with it's neckward pickup and OMG mode, but for other basses I'm not so sure. (Also, the 1 meg reverse log taper pot is a bit hard to find.)

    So instead, I'd second the suggestion for a series-parallel switch, and I'd add a toggle or rotary switch to give you two or more treble cut capacitor options. (Or you could buy the commercial version--a StellarTone Tone-styler). So your five controls would be: series-parallel switch, vol, vol, tone, capacitor switch.

    Dec1975 likes this.
  8. NoiseNinja

    NoiseNinja Experimental-psychedelic-ambient-noise-drone Banned

    Feb 23, 2011
    Yup, two volume pots, a rotary capacitor switch, a master tone pot and finally a 4 way pickup selector switch including one position for series connection is probably the way I would go too if it were my bass.

    And might I add, if I had the patience it would take to do so with my soldering skills and capability to understand electronic diagrams.
    Dec1975 likes this.
  9. NKBassman

    NKBassman Lvl 10 Nerd Supporting Member

    Jun 16, 2009
    Winnipeg, MB, Canada
    4-way rotary pickup selector (Bridge, Both Parallel, Both Series, Neck)
    Master Tone
    Master Low Cut
  10. BassBuzzRS


    Oct 18, 2005
    Vol vol tone producerknob1 producerknob2
    Dec1975 likes this.
  11. seanm

    seanm I'd kill for a Nobel Peace Prize! Supporting Member

    Feb 19, 2004
    Ottawa, Canada
    Why do you have to use them all? I quite often disconnect the tone control on my P basses (2/3). I leave the pot in place, it just isn't connected to anything.
  12. Toptube


    Feb 9, 2009
    With the ultra jazz you have two coils in each pickup. I would have a switch which makes each pickup's own coils series or parallel. Then I would do a typical series switch, which makes both pickups on series with each other.

    Then a blend, master volume, and tone.
    NKBassman likes this.
  13. Consider filling some holes with a producer knob. Or a dick dale style filler for car antenna holes
  14. Clark Dark

    Clark Dark

    Mar 3, 2005
    Which control is wired wrong, the treble or bass?
  15. The tone control is the pot marked "treble."
    Clark Dark likes this.
  16. Wfrance3

    Wfrance3 Supporting Member

    May 29, 2014
    Tulsa, OK
    Single parallel series switch
    Single parallel series switch
    Assuming 4 wire pickups...
  17. superheavyfunk

    superheavyfunk 音楽は人生だ

    Mar 11, 2013
    Two tones on a bass is a standard Warwick practice. All passive warwicks have this very set up and it works quite well, imo & IME. The cats at stellartone seem to think it's a good set up too, as they told me when I emailed them looking for information.
  18. This is a subjective matter. Opinions vary considerably.
  19. superheavyfunk

    superheavyfunk 音楽は人生だ

    Mar 11, 2013

    It is fact though, that V/V/T/T is a standard, albeit not the most popular, practice. And to Warwick has been wiring their passive basses this way for decades.
  20. Fender did it in the 1960s, before switching to VVT. Just because it is a common practice does not mean that it is ideal. That's why there are a plethora of wiring options to choose from. You don't have to like my opinions, but you should at least defend VVTT wiring by citing one of its advantages, rather than trying to appeal to tradition.

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