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Bart Quad Coils

Discussion in 'Pickups & Electronics [BG]' started by Jeff Moote, Aug 23, 2003.


  1. Jeff Moote

    Jeff Moote Supporting Member

    Oct 11, 2001
    Beamsville, ON, Canada
    I'm looking for info on these, as I can't seem to find any. The bartolini site seems pretty out of date and doesn't say much about them, and searching the web brought nothing.

    I'd like to know the wiring schematic for them (I'm told they have 6 terminals) and the ways to switch it for split coil / single coil / duel coil / quad coil.


    Thanks
     
  2. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member Supporting Member

    It doesn't work this way.
    Picture 4 individual single coil pickups, 1 per string. Wired series.
    That's what you get.
    So basically there is no splitting option unless you want to have some mute strings.
    There are 8 pegs under the pickup, 2 per string/coil.
    They come factory-wired series but you can re-arrange them.
    I've wired mine (E//A)+(D//G) to match the neck P output (I only have a Quad bridge, it's a PJ bass).
    All in one, the Quad is the clearest sounding J I've ever experienced, with absolutely no hum or noise. Highs are a bit attenuated, as usual with Barts.
     
  3. bassmonkeee

    bassmonkeee Supporting Member

    Sep 13, 2000
    Decatur, GA
    Actually, this isn't necessarily true. Bart makes two different kinds of quad coils.

    I've got quad coils in my US Curbow 8 string, and they are currently wired in a P/all/reverse P config. And, I certainly don't have any problems with mute string.
     
  4. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member Supporting Member

    So maybe we're not talking about the same pickups.
    The ones I'm talking about are J sized pickups and sell (sold ?) under the reference Quad.
    I bought them in 1995.
     
  5. Jeff Moote

    Jeff Moote Supporting Member

    Oct 11, 2001
    Beamsville, ON, Canada
    I should have clarified... they did make the J style one coil per string type, but that's not what I'm talking about at all.

    I'm referring to the ones like bassmonkee has, and I want to know more or less how to do switching like he has set up in his.
     
  6. Jeff Moote

    Jeff Moote Supporting Member

    Oct 11, 2001
    Beamsville, ON, Canada
    Anyone?

    A diagram? Something?
     
  7. geshel

    geshel

    Oct 2, 2001
    Seattle
    You know, I've got them in two basses, and I'd like to know too. I rewired the ones in my fretted, and didn't get exactly what I thought I would. But I just used the leads that were available in the cavity (4 per pickup: red, white, green, black), I didn't take out the pickups and rewire anything near them.
     
  8. geshel

    geshel

    Oct 2, 2001
    Seattle
    P.S. I don't think they make the quad-coil Js anymore (9W4J). :(
     
  9. Yeah, and didn't they also quit making the 4-string quadcoils (the non J's...in the catalog i can only find the 5-&6-string versions):confused:
     
  10. geshel

    geshel

    Oct 2, 2001
    Seattle
    I'm not sure - I have the catalogs going back to 2000 and none of them have 4-string quad-coil soapbars.
     
  11. I thought they used to have those :meh: . Maybe i'm wrong
     
  12. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member Supporting Member

    Yeah, they stopped.
    Best J style pickups I've ever tried.
    Hopefully I kept mine.
     
  13. FBB Custom

    FBB Custom TalkBass Pro Commercial User

    Jan 26, 2002
    Maryland
    Owner: FBB Bass Works
    The quad coil soapbars have 6 leads. Many of them come wired from the factory with 4 leads.

    Looking at the back of the pickup, with the "b" (of Bartolini) side of the pickup to your right, there are 8 leads coming out of the pickup

    1 2-3 4
    8 7-6 5

    These are the taps.

    1 green
    4 red
    5 white
    8 black

    from the factory.

    Their documentation says to get P wirings:

    1 white
    23 blue
    4 green
    5 orange
    67 red
    8 black

    All the wirings you want may not be possible with one switch.

    Full width mode:
    tape blue & red off
    ground white/shield
    connect green & orange and tape back
    hot is black

    P switch (DPTT on-off-on):

    1 2 3
    6 5 4

    1 wh/shield ground
    2 blue
    3-6 green/orange
    5 red
    4 black hot

    This gives P (normal)/humbucker/P (reverse)

    This from their documentation. If you want your own custom wiring, you'll have to sort out where all the coil taps are coming from and figure out how to do the switch.
     
  14. Saint

    Saint

    Mar 2, 2000
    DC - USA
    I've got to believe they still make the quad coils for the Pedulla Buzz bass (the 9W4J or some equivalent). But why stop selling them? Those were among the most unique pickups on the market and there always seemed to be a demand for them.
     
  15. geshel

    geshel

    Oct 2, 2001
    Seattle
    Thanks Matt! Woo that's gonna keep my brain thinking for a little while. I'd better get a decent soldering iron before I mutilate my basses with the clunker I've got now. . . :D
     
  16. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Geshel,
    how did you get on with this?

    I just found out my Elrick came with the xxP2 quad coils, I'm interested in wiring the neck pickup to be P / reverse P rather than the full series operation it's wired right now which is a bit boomy for my tastes.
     
  17. geshel

    geshel

    Oct 2, 2001
    Seattle
    I never really quite got all that straightened out in my head, so never took the bass apart to try anything out.
     
  18. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Matt, many thanks for this explanation. It's still baking my noodle a bit, is there any chance you could post the actual document?

    I asked the Bartolini customer service black hole also, I'm not hopeful of a response.

    thanks
     
  19. FBB Custom

    FBB Custom TalkBass Pro Commercial User

    Jan 26, 2002
    Maryland
    Owner: FBB Bass Works
    I essentially did post the document. It comes on a photocopied page, hand written and drawn.

    If you are looking for something specific, like "how to do P wiring, south" or something, shoot me an email.

    If you're looking to reduce the boom of a series-wired P2, probably your best bet is just to switch over to parallel wiring rather than P-bass.
     
  20. Brad Johnson

    Brad Johnson Commercial User

    Mar 8, 2000
    Gaithersburg, Md
    Boom Bass Cabinets, DR strings
    I have three basses with quadcoil soapbars and I love 'em.