JBL LX5 crossover and N7000

Discussion in 'Speakers' started by demenplk, Nov 10, 2017.

  1. demenplk

    demenplk New Member

    Messages:
    12
    JBL LX5 crossover and N7000
    I have JBL C60 Sovereign: Bass LE15A Mid LE85 PR15 075 (All 8Ohm). I started restoring the speakers. I don't known connect between LX5 and N7000. The LX5 with an LE85/HL91 with the polarity to the HF section reversed Please help me.
     
  2. L200B

    L200B Active Member

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    217
    Location:
    Los Angeles, CA
    The hf out from the LX5 goes to the input of the N7000. I don't believe anything should be reversed.
     
  3. demenplk

    demenplk New Member

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    i dont known LX5: pin 3 - 4 (HF)? Pin 3: Red And Pin 4: Black input N7000 or Pin 3: Black and Pin 4: Red input N7000?
     
  4. L200B

    L200B Active Member

    Messages:
    217
    Location:
    Los Angeles, CA
    pin 3 is black pin 4 is red
     
  5. toddalin

    toddalin Super Member

    Messages:
    1,725
    Most typical arrangement.

    Input + to LX-5 Red Terminal (on lower right)***

    Input - to LX-5 Black Terminal (on lower left)***

    Woofer + to Outter Low Freq output on LX-5

    Woofer - to Inner Low Freq output on LX-5

    Input + of N7000 to Outter Hi Freq output on LX-5

    Input - of N7000 to Inner Hi Freq output on LX-5

    Midrange Driver + to Outter Low Freq output on N7000

    Midrange Driver - to Inner Low Freq output on N7000

    Tweeter Driver + to Outter Hi Freq output on N7000

    Tweeter Driver - to Inner Hi Freq output on N7000

    ***The speaker is actually reversed polarity from what is conventional (i.e., the woofer pulls in when positive is applied to the positive terminal rather than pushes out). To correct for this (typically when used with other speakers as in an HT set-up or just to maintain "absolute polarity" assuming it is not being inverted elsewhere in the system), you would wire the amplifier's + to the speaker/crossover's black terminal and vice versa.

    http://www.jblproservice.com/pdf/Network Schematics/LX5.pdf

    http://www.jblproservice.com/pdf/Network Schematics/N7000.pdf
     
    Zonker92 likes this.
  6. demenplk

    demenplk New Member

    Messages:
    12
    Thanks L200B and Toddalin very much,

    My speaker is attachment image, since i bought it. And it is Mid LE85 not right 375.
    Input + to LX-5 Red Terminal (on lower right)***
    Input - to LX-5 Black Terminal (on lower left)***
    Woofer + to Outter Low Freq output on LX-5
    Woofer - to Inner Low Freq output on LX-5
    Input + of N7000 to Outter Hi Freq output on LX-5
    Input - of N7000 to Inner Hi Freq output on LX-5
    Midrange Driver + to Outter Low Freq output on N7000
    Midrange Driver - to Inner Low Freq output on N7000
    Tweeter Driver + to Outter Hi Freq output on N7000
    Tweeter Driver - to Inner Hi Freq output on N7000


    I config Tweeter Driver wrong?

    Please help detailed guide to me.
     

    Attached Files:

  7. toddalin

    toddalin Super Member

    Messages:
    1,725
    It looks like you have the red and black reversed on the LX-5 before it goes to the N7000.
     
  8. demenplk

    demenplk New Member

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    12
  9. toddalin

    toddalin Super Member

    Messages:
    1,725
    As I said, what I described seems to be the most typical arrangement, but there are cases where it may sound better the other way.

    Either way creates peaks and nulls and the room can come into play as to what is best way to wire it to get the best sound in the seating area.
     
  10. demenplk

    demenplk New Member

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    12
    Thanks Toddalin for your help.
     
  11. tubed

    tubed Lunatic Member

    Messages:
    12,771
    Location:
    Aztlan
    Here's how mine are wired from the outside.
    Picture 1811.jpg
     
  12. toddalin

    toddalin Super Member

    Messages:
    1,725
    For many years I had mine wired as shown because it seemed to produce a smoother curve on the Behringer. But changing the wires, as I recommended, seems to bring out the vocals better and this is what I prefer. So, at least in my setting, this affects a node in the vocal range that increases/removes intelligibility.

    BTW, I did this by setting the crossover up so that I could sit in the seating position and reverse the phase to the horn, then the tweeter, back and forth with a toggle switch, so that I could instantaneously A/B them, and went though many hours of disks just listening to the minute differences.
     
    Last edited: Nov 12, 2017
  13. tubed

    tubed Lunatic Member

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    12,771
    Location:
    Aztlan
    It's easy enough to try:thumbsup:
     
  14. demenplk

    demenplk New Member

    Messages:
    12
    I have been listening for about 2 years. When I changing red and black reversed. The sound of midrange frequency will change. Pin 3 Red Pin 4 Black: the sound of Midrange is too low if Pin 3 Black Pin 4 Red: the sound of Midrange is too Hight.
    it is not balanced. Maybe the amplifier for me is not very good or Mid LE 85 run 500Hz, it is't compatible Tweeter Driver 075 run 800Hz
     
  15. tubed

    tubed Lunatic Member

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    12,771
    Location:
    Aztlan
    I think mis-wired drivers can cause midrange suckout especially if the drivers occupy different baffle planes.
    As toddalin said, connect wires according to which phasing sounds best.
    Better sound with tweeter and mid out of phase to each other, especially that horn and tweeter combo?
     
  16. demenplk

    demenplk New Member

    Messages:
    12
    Hi Tubed,
    Which brand of speaker cables do you use?

    I have customized you for N7000. The sounds is better, still experiencing it
     
    Last edited: Nov 14, 2017 at 9:00 PM
    tubed likes this.
  17. tubed

    tubed Lunatic Member

    Messages:
    12,771
    Location:
    Aztlan
    Zipcordion;)

    Glad to hear, enjoy.
     
  18. demenplk

    demenplk New Member

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    12
    I can't find information this Zipcordion Speaker Cable. I think it compatible the vintage speaker. I want to buy and try it
     
  19. tubed

    tubed Lunatic Member

    Messages:
    12,771
    Location:
    Aztlan
    Really nothing extraordinary, my friend.
    14 to 16 gauge copper wire, oxygen-free common speaker wire.
    The speaker thickness to accommodate JBL LX5 speaker terminals, in this instance:thumbsup:
     

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