Stock Subaru under seat sub wiring question...for a Volvo 240
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This is a discussion on Stock Subaru under seat sub wiring question...for a Volvo 240 within the Electronics/Car Audio forums, part of the Interior Mods category; I was at the junkyard the other day, and scored a stock under seat sub from a legacy a few ...

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    Stock Subaru under seat sub wiring question...for a Volvo 240

    I was at the junkyard the other day, and scored a stock under seat sub from a legacy a few days ago...I say "scored" because it cost me only $10, and I was looking to give the system in my old volvo ('82 project car) a bit of an improvement. By the looks of it, the sub looks like the same option that was available on my '12 WRX. With that said, does anyone know if it's possible to wire this to a non-stock system? The volvo currently has an Alpine CDA-9883, and four kenwood 4" speakers. I did keep the pigtail for reference, and I do plan on getting a pretty basic amp. I am just looking to have something decent in the car, but I am saving most of my money for other mods (e.g. turbocharging), hence the current setup. Oh, I also did grab the rear door speakers form the legacy, which look like they're 5" or 6." I haven't hooked those up yet, but I am guessing they will still be an improvement from the 4" speakers currently in the car.

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    Subaru Newb MainFrame's Avatar
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    From what I remember they take line level inputs. So it should be as easy as wiring hot, ground, remote, and splice line level outs off of your rear door channel.

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    Quote Originally Posted by MainFrame View Post
    From what I remember they take line level inputs. So it should be as easy as wiring hot, ground, remote, and splice line level outs off of your rear door channel.
    Post No. 4 in this forum says something similar: Stock head unit information -- pin-outs, aux inputs, and more - NASIOC However, no remote, and the sub is wired to the actual speakers. So, if I understand this correctly, I can get a 12V lead directly from the battery, ground to the frame, tap directly into each speaker, and I'm good to go? If so, do I wire the two speakers as a series, or parallel? Any benefits to wiring the fronts verses the rears (I've heard either was done, depending on the year)?

    The "sub" does have an amp built into the enclosure from what I read, so it seems as though the amp powers the sub based on the signal it gets from the mids...right?

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    Subaru Newb MainFrame's Avatar
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    Yeah.. that's what "line level" means, the wires that run to the speakers. You would splice into the wires, so I suppose that would be parallel.


    Front and rear get the same signal, so that's all up to you. Most people prefer to have the sub on the rear channel for whatever reason. The only difference it really makes is with fader adjustment. If you wire the sub to the rears and set the fader all the way front then the sub will get no signal.

    The amp is built in, yes. It takes line level inputs and basically adds juice before heading to the speaker itself.



    For what it's worth, the OEM Subaru sub is complete junk. I have had three pass through my hands over the last ten years, and all three of them ended up in the trash.

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    Quote Originally Posted by MainFrame View Post
    Yeah.. that's what "line level" means, the wires that run to the speakers. You would splice into the wires, so I suppose that would be parallel.


    Front and rear get the same signal, so that's all up to you. Most people prefer to have the sub on the rear channel for whatever reason. The only difference it really makes is with fader adjustment. If you wire the sub to the rears and set the fader all the way front then the sub will get no signal.

    The amp is built in, yes. It takes line level inputs and basically adds juice before heading to the speaker itself.



    For what it's worth, the OEM Subaru sub is complete junk. I have had three pass through my hands over the last ten years, and all three of them ended up in the trash.
    I am well aware ;-) I bought this car with 303K miles on it for $300 ... with four 4" speakers, so everything is relative. I did end up installing it, and it turned out better than I thought. I kept the two Kenwood 4" speakers in the front doors, but substituted the larger legacy speakers in the rear doors. The wagon has a nifty compartment in the very back that is completely empty, so I stuck the "sub" back there. What this has really done is what most others have said: it has added some mids. The Kenwoods also sound muuuuch better now. The whole setup cost me about $20.

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