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Couple of Sub Questions.

Discussion in 'A3/S3 Forum (8L Chassis)' started by A3 T, Mar 25, 2011.

  1. A3 T
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    A3 T Lord Of The Rings

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    [Mar 25, 2011]
    What's the best way to run the power cable to the boot?

    Usually i just tuck it under the side skirts but on this car it seems impossible....lol

    My other question is,

    How good are the alternators on these cars?

    Are they strong enough to handle a sub.



    Thanks guys ;)
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  2. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Mar 25, 2011]
    On the A4 i took it in thru the ECU box, then along under the kick plates on the inside of the sills. If you remove the kickplates and lift the carpet at the edge theres probably a wiring channel down there anyway.

    Alternator depends on equipment spec, the one in the A4 is 90A, wether that will be enough depends on your install though.

    I have a sub, plus a discrete amp for the door speakers running off mine, with the smallest battery in the world, and it handles it just fine. But then mines not THAT powerful an install and it spends most of its life at "normal" listening levels rather than "trying to blow my windscreen out" listening levels.
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  3. <tuffty/>
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    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator

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    [Mar 25, 2011]
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  4. A3 T
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    A3 T Lord Of The Rings

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    [Mar 25, 2011]
    Thanks guys ;)

    I don't think ill have a problem getting the wire from the engine bay to the car as I've been doing a load of reading about fitting a boost gauge and that the place they say to run the pipe for it.....lol



    Are the plastic side skirts easy to get off because i gave them a good pull and they didn't budge :(


    Oh..... and my ones a 5 door so ill need to do it four times :sadlike:
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  5. <tuffty/>
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    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator

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    [Mar 25, 2011]
    They are held in with silly metal spring clips... I used a 'trim tool' to lever them out carefully...yanking tends to break the trim...

    <tuffty/>
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  6. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Mar 25, 2011]
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  7. A3 T
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    A3 T Lord Of The Rings

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    [Mar 25, 2011]
    Thanks mate

    So its just poke the wire through the hole in the bulk head and and use a screwdriver on the &#8220;door seal trim&#8221; :)
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  8. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Mar 25, 2011]
    You have to drill a hole in the rubber grommet, then poke a wire coathanger through, attach the cable to the coathanger with electrical tape, use a bit of fairy liquid on the join then pull it back through.
    With the trim, it is all interlinked, so with the glovebox removed, remove the side footwell trim first, then just prise up the door sill trim with your fingers. No special tools required.
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  9. audi-tk
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    audi-tk Member

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    [Mar 26, 2011]
    I've got a 15" type r sub powered by 800rms legacy amp and it blows lol. Alternator ain't packed in just yet. A updated battery from halfords would be good to have. Had it on my 1000rms set up. Lasted quite a while
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  10. A3 T
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    A3 T Lord Of The Rings

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    [Mar 26, 2011]
    Thanks guys ;)


    Ill let you know how i get on.
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  11. TheButtonz
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    TheButtonz Member

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    [Mar 26, 2011]
    I ran mine via the bulkead hole, much the same as the coathanger way. I'd suggest threading a much thinner wire first, then use that as a lead to drag the power cables. No extra drilling is needed (as far as I'm aware) and I have 2 power cables.

    Once down, runs along the door carpet etc inside, then up behind the rear quarter panel.

    My lights dim when the base get's hot, but it's never affected the car. I am consdiering a farad for it.
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  12. A3 T
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    A3 T Lord Of The Rings

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    [Mar 26, 2011]
    My setup consists of 2 x 12” rockford fosgate subs in a custom built box, a Kicker amp and a power cap.


    The only thing that looks to be a pain in the a*s is having to take all the glove box out just to be able to run the wire down the side skirts :sadlike:


    @ TheButtonz

    I had this setup (minus the cap) in one of my cars a while back and when the bass kicked in the headlights almost went out, i fitted the power cap and the problem went away.


    You'll probably see loads of sites saying they don't work but in my case it was brilliant.
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  13. A3 T
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    A3 T Lord Of The Rings

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    [Mar 28, 2011]

    Is this where you run yours mate ?

    [​IMG]
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