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DiMarzio Model J Installation - HELP!!!

Discussion in 'Pickups & Electronics [BG]' started by jazz5757, Apr 17, 2005.


  1. First-time pup install here so go gentle.... :D

    Here's what I've got going. Bought a Geddy Lee Jazz recently, then picked up a new wine red jazz body (blsck's too boring for me) and some Dimarzio j's to beef up the sound.
    Removing the stock Fenders pups there is only one white and one black wire on the end of each pickup...it looked simple enough. Enter the Dimarzio's: now I've got a white and green wire on one end and a red and black wire on the other end of each pickup. I'll be using the Geddy electronics taken form the bass. I can't find any install instructions - can anyone lend me a hand here?
     
  2. The extra black and white wires per p/u are for a series option. For standard parallel wiring, solder the black wire to white wire for each p/u put some electrical tape on the solder joint and tuck the wires underneath the p/u, then, Red is hot (to 2nd leg of pot). Green is ground (to pot top).

    http://www.dimarzio.com/Text/Install/ModelJ.pdf
     
  3. Tim - thanks a million - just what I needed!
     
  4. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Tim, that's actually series wiring not parallel. By soldering the black and white together you're putting the coils in series.
    Other than that, spot on. And you'll probably want to wire it in series anyway.
     
  5. Should I be using the metal grounding plates that were under the GL pups when I put the Dimarzio's in the new body?
     
  6. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    You can. Just keep them grounded as they were before
     

  7. David-
    It makes sense to me that for parallel wiring tying the black and white wires on each p/u together to be closing the connection per p/u as opposed to running one p/u to the other. No?

    If that's series wiring, how would you wire them for parallel?
     
  8. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    No.

    It's not closing the connection per pickup, you're joining the ground of coil A to the hot of coil A. This creates a series connection.

    In parallel, you would have the hot of both coils going to the same vol pot and both grounds soldered to ground. More commonly, you'd wire to a DPDT switch for series/parallel switching.
     
  9. Thanks for clarifying!

    I find it strange that the DiMarzio instructions default is series wiring.
     
  10. Ok, now I'm a bit confused - don't i want to install in parallell and not series?
     
  11. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    The vast majority of humbuckers are wired in series by default.
    The one notable exception I can think of is the Stingray, whose pickup is wired in parallel
     
  12. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    It depends, what sound are you after? If you want the thick mid sound that people describe about the Model J, you want series
     
  13. Actually, I want as much LOW end as I can get. Have i made a bad pickup replacement choice in this regard - that is, would I have been better off to stick with the stock GL pups?
     
  14. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    We all have different tastes, I don't know what you'll like and even if I did I don't know what your technique/strings/amp are.

    The J's are perfectly good pickups, now you've bought them you might as well try them - if you've opened them you almost certainly can't return them, and if you don't like them you can resell for $60-$70.

    If you didn't do so before, I'd recommend a search in this forum - probably using the term Geddy since GL is too short to search on. What made you decide to buy the Model Js? Like I said, it might well be the right decision for you, but just wondering how you came to the decision?
     
  15. Bought the Model j's off Ebay for $65, mainly read about them on TB and the inpression I got was that they definitely fatten up the tone of any j. Playing through a DB 750, Eden 212xlt and Eden 210xlt...FWIW I'd make it sound like a p bass if I could...maybe I just should have attached the geddy neck to a p bass body... :D
     
  16. xbradx

    xbradx

    Oct 25, 2004
    Indianapolis, IN
    just checking out the thread(due to interest in the model J's myself), and it seems there's a bit of confusion with the series/parallel wiring options.
    each of the j-pickups is humbucking and should individually wired in series, with the two pickups(bridge and neck) wired parallel like a standard jazz. hope that makes sense.
    just my .02 :bassist:
     
  17. Dan1099

    Dan1099 Dumbing My Process Down

    Aug 7, 2004
    Michigan
    Yeah, there is some confusion going on here. The difference is some of you are talking about wiring the pickups together, and some are talking about wiring the individual COILS of the pickups. The question he has involves wiring the pickups COILS together. As such, series is the standard wiring for DiMarzio pickups. To achieve this, follow the above instructions for each pickup. Following the "red = hot, green = ground" with each pickup, to the already existing volume pots, wires the pickups together in parallel, which is the standard wiring for Jazz basses. I recommend following these instructions to the T. You may later want to look at a series/parallel mod, which, at the flick of a switch, would allow the pickups to be wired together in series.
     
  18. jmjbassplayer

    jmjbassplayer Justin Meldal-Johnsen

    Mar 25, 2005
    Just today I installed some Model J's into my Geddy Jazz. It really sounds great, but I wonder if I did it series or parallel. Here's what I did:

    -Red wire of each pickup to the #2 post (hot) of each volume pot

    -Green wire of each pickup were both soldered to the grounding screw that attaches to the plate at the bottom of the control cavity

    -Black and white wires of each pickup were soldered together.

    The only variation I did to the instructions that came with the pickups for series (humbucking) wiring is that I wired the green (ground) wires to a central grounding point, instead of to the back of each volume pot like it says in the directions. The reason why I did this is because that's the way the Geddy was originally wired, and all the grounds seemed to connect to this one location.

    Can someone let me know where I stand? It sounds really good, tons of punch and a warmly aggressive personality with (thankfully) very little sheen or unnatural brightness.

    Anyway, I'd just like to know if I wired everything properly for the tone with the maximum amount of "guts" and output, which I gather is known as "series", yes?

    Thanks,
    JMJ
     
  19. Dan1099

    Dan1099 Dumbing My Process Down

    Aug 7, 2004
    Michigan
    You have it wired with the coils in each pickup in series, and the pickups in parallel with eachother. The grounding you have is fine, and possibly even better then the "standard" method, if done well.
     
  20. jmjbassplayer

    jmjbassplayer Justin Meldal-Johnsen

    Mar 25, 2005
    Thanks, Dan. But is this method not the optimum amount of output or punch? In other words, since I have the pickups in parallel, shouldn't I get them so they are in series?
    Best,
    JMJ