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What's need to hook up amp/sub to head unit?

Discussion in 'Audio & Video' started by Compromised 4Runner, Jun 4, 2019.

  1. Jun 4, 2019 at 9:59 AM
    #1
    Compromised 4Runner

    Compromised 4Runner [OP] New Member

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    Hello peeps

    Went in expecting to get a tacoma, but ended up with a 2018 4Runner SR5 instead! Made the right decision.

    Since I have the thread, can anyone point me to a tutorial or video about hooking up an amp/sub to a 2018 or 5th gen 4runner head unit? I get the basics of it all, just not sure if the stock head unit has the rca plugs and a spot for the amp remote wire. If it does not, should I get something like this? Didn't find what I was looking for on youtube or in the audio/video section here.

    Thanks!
     
  2. Jun 4, 2019 at 11:51 AM
    #2
    jester243

    jester243 rabble rabble rabble

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    welcome to the group :wave:
     
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  3. Nov 15, 2019 at 7:45 PM
    #3
    cmtaz

    cmtaz New Member

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    I used an amp with speaker level inputs. Out of the headunit into the amp, and use the amp for crossovers and levels
     
  4. Nov 15, 2019 at 9:01 PM
    #4
    RUNNING4N602

    RUNNING4N602 New Member

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    [​IMG] Cmtaz is on the money with getting an amp that has speaker level input connection. I used the Kac-9106. You can run the speaker connection using the front driver side dash speakers. Use the t taps on Positive Wire (+): Light Green and Negative Wire (-): Blue. Amp will fit right under driver seat. Hope it helps
     
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  5. Nov 15, 2019 at 11:28 PM
    #5
    kbp810

    kbp810 New Member

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    If you’re just planning on adding a sub, the harness you listed wouldn’t be a bad idea. Otherwise, you can get the metra connectors and some 8 conductor speed wire off Amazon (or other), and build your own plug and play harness including all four channels. Essentially you’ll just run the speaker wires from the radio into the amp (speaker level inputs), then the speaker wires from amp, back to the other connector end that will run to your stock speaker wiring. Easy to reverse in case you ever go to sell and want to return back to stock.

    Note that I think taco tunes sells a harness that does essentially the same; but it’s cheaper and fairly easy to do on your own if you don’t mind a little work.

    71D4AB27-B465-4F9A-A40D-10353047CF04.jpg
     
  6. Nov 16, 2019 at 4:32 PM
    #6
    cmtaz

    cmtaz New Member

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    This is your million dollar answer !!!

    I had this done (the Metra 70-1761 & 71-1761 harnesses and some 9 wire) after i replaced my speakers. 5 channel pioneer GM-D9605 (any amp will do) w/ a bass knob and a 12" shallow mount pioneer sub in the enclosure. one of the benefits of doing this way (a side from being easy to reverse and to return back to stock) is your balance a fader still work.

    One tip.... turn OFF the entune speed volume adjustments.


    IMG_20181202_143002.jpg IMG_20181202_142920.jpg
     
    Last edited: Nov 19, 2019
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  7. Nov 17, 2019 at 3:22 PM
    #7
    RUNNING4N602

    RUNNING4N602 New Member

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    Installed aftermarket amp w/o rca’s
    I added this sub do you guys think it’s to bulky?CA06E541-B5E9-463C-8683-107378EE9407.jpg
     
  8. Dec 2, 2019 at 5:37 AM
    #8
    ManBeast

    ManBeast New Member

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    I think that port is too small.
     
  9. Dec 2, 2019 at 6:02 AM
    #9
    RUNNING4N602

    RUNNING4N602 New Member

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    What’s your thoughts on sub enclosures 308D712E-F840-4DD0-904E-972655A67AED.jpg
     
  10. Dec 14, 2019 at 2:55 PM
    #10
    Pschiller86

    Pschiller86 New Member

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    Do you have the diagram of the wiring harness you made using the speed wire?
     
  11. Dec 14, 2019 at 3:06 PM
    #11
    kbp810

    kbp810 New Member

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    Not right off hand, but if I recall correctly, everything was color coded (speed wire colors matched the metra harness connector wire colors); and the metra connectors also had a list of which color wire did what. Also FYI, there is one wire (orange I think?) that doesn't get used; it will be obvious which one when the time comes, as there won't be a mate for it on the other harness side. It was all relatively fool proof.

    From a quick google search, here is a reference as well; it's the same for all 87' and up Toyota's (for the two main connectors).

    https://forum.ih8mud.com/attachments/radio2-jpg.671492/
     
  12. Dec 14, 2019 at 3:20 PM
    #12
    Pschiller86

    Pschiller86 New Member

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    This should work on an aftermarket head unit too?
     
  13. Dec 14, 2019 at 3:30 PM
    #13
    kbp810

    kbp810 New Member

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    You most certainly could - but I would leave the speaker connections off of the side coming "from" the radio; and use the RCA jacks instead (will provide a better signal for your amp to work with). Then just use the speedwire from the amp back up to the harness end that goes out to your factory speaker wiring.
     
  14. Dec 14, 2019 at 3:37 PM
    #14
    Pschiller86

    Pschiller86 New Member

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    Yeah that’s what I meant! Lol. RCAs from the head unit and the speed wire going back.
     
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  15. Jan 18, 2020 at 2:45 PM
    #15
    Pschiller86

    Pschiller86 New Member

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    Anyone have pics of amp racks they’ve used?
     
  16. Jan 19, 2020 at 7:28 AM
    #16
    Johnny 4th Gen.

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  17. Feb 13, 2020 at 6:16 AM
    #17
    Myla86

    Myla86 New Member

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    Can you give directions on how to make the harness? And what’s the “blunt” end for? Where it looks like it’s just taped off?
     
  18. Feb 13, 2020 at 6:34 AM
    #18
    kbp810

    kbp810 New Member

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    I think you were referring to my DIY harness - the blunt end in the picture just hasn't been stripped back yet... those would be the speaker wire connections to the Amp speaker outputs (amp back to the factory speaker connections).

    The harness is pretty easy to put together... the colors on the metra harnesses match the OEM wire colors, and comes with a list on the packaging of which color does what. There are also toyota radio wiring diagrams readily available via a google search; the two main harness connections that contain the speaker wires has been unchanged since 1987 (so look for any diagram that references 1987 and up toyota).
     
  19. Feb 13, 2020 at 12:58 PM
    #19
    Pschiller86

    Pschiller86 New Member

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    hey Myla there’s some pretty good details on the Tacoma world forums of all the wiring
     

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