Request: DIY Options to Install Subwoofer and Amp 2020 Si Sedan (have sub and amp from previous car)

  1. cfusionpm

    cfusionpm New Member

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    Matt
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    2020 Civic Si, 2013 Scion FR-S
    Hello. It seems to be a bit overwhelming with options for subwoofer installs. I have seen many different things that don't quite match with my situation.

    I had this sub and amp previously installed by a shop (Kenwood DDX470 in 2013 FR-S), but I want to see if I can do it myself this time, and to the factory Si radio head unit.

    I do not have the wires from the old car, other than the wires to connect the sub to the amp. Based on my rudimentary knowledge and from taking it apart on the FR-S, I will need power to the amp, a "remote" wire to the amp, and RCA cables from the head unit to the amp. I have no idea what specific wiring I would need or if I need additional hardware (I saw lots of people split on this LC2i device that I'd never previously heard of).

    I have also seen people run directly off the factory sub wires. Seems easier, but may or may not be enough power or as good of a signal.

    I have a JL 10w3 and Alpine MRP M500, intended for a 2020 Si Sedan.

    Halp?

    GucOcL.jpg
     
  2. TheLifeOfBrax

    TheLifeOfBrax Member

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    Braxton Brown
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    I know this a late reply but I just installed my Alpine S Series sub and RF amp in my 18 Si coupe. To start, you won’t need to touch the head unit. I tapped my line out put to the stock sub wire. Only wires you’ll need to run is the remote wire to your fuse box and connect it to an ignition only fuse! I can post pics and help you through the process if you haven’t already done it.
     
  3. Triple_peaz

    Triple_peaz Brother Taresa

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    There's a good write up on here about everything audio on here. I read that you get way better frequency range from tapping your loc into your front speakers (front door or center). Pretty sure that's what I read.

    I have did my loc thru my factory sub before that writw up, I will be changing it when I have the time.
     
  4. TheLifeOfBrax

    TheLifeOfBrax Member

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    Gotcha! Yeah I did mine through the stock sub and don’t notice any difference between tapping into the front speakers.
     
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  5. Triple_peaz

    Triple_peaz Brother Taresa

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    I noticed a major difference from this same setup I had in my 8thgen si. The bass was killer, now not so much
     
  6. TheLifeOfBrax

    TheLifeOfBrax Member

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    Let me know when you do it! I’m curious to see the difference.
     
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  7. Triple_peaz

    Triple_peaz Brother Taresa

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    I will, I get back from a cruise tomorrow, and I have about two more weeks before I go back to work. I have a long list of crap I need to do with my car
    (re wire sub, dremel bass knob, hardwire interior leds, swap street maf with race maf for Cai, install flex fuel kit, oil change and tires and a complete car detail engine bay and all...) Goodluck to me
     
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  8. TheLifeOfBrax

    TheLifeOfBrax Member

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    Yeah good luck with everything! Looks like you have your hands full
     
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  9. Triple_peaz

    Triple_peaz Brother Taresa

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    Yes sirrr thank you
     
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