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Aftermarket radio.

Discussion in 'A4/S4 forum(B5 Chassis)' started by Dec11495, Mar 22, 2014.

  1. Dec11495
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    Dec11495 Member

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    [Mar 22, 2014]
    Hey guys, I've got the old concert stereo out, went to fit the new one but the connections don't look right. I've been told I need a harness? Which one do I need? Thanks
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  3. Oranoco
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    Oranoco Well-Known Member

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    [Mar 22, 2014]
    I assume you have the part amped set up? I wouldn't bother with the adapter lead and would just run a couple of new sets of wires up the car to the back speakers bypassing the amp. Might be nice to swap the rear speakers out whilst you're playing with audio.
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Mar 22, 2014]
    really need to know what you've got in there at the moment.

    Most A4's have a part-amped setup as mentioned.

    This has a small amp in the rear which drives the rear speakers, and if its an avant, a small subwoofer too. The front speakers are driven directly by the head unit.

    You can either get a lead to connect the pre-out on your head unit to this amp:

    Car Audio Equipment | Buy online at Car Audio Security

    Or as Oranoco says, you can re-wire the rear speakers into the headunit. If its an avant though you'd lose the sub, so its probably better to just buy the adaptor.
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  5. Dec11495
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    Dec11495 Member

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    [Mar 22, 2014]
    I've got an avant and it doesn't have the Bose system. So I'm guessing it's half amped. There's a sub? Where? hahah
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Mar 22, 2014]
    In the passenger side cubby.

    If you look in thru the hatch towards the front of the car, you should be able to see the black plastic of its enclosure.
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