Chris NottAH Fabrications
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  1. #1
    S4_dan's Avatar
    Fire up the Quattro!

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    Aftermarket HU speaker issues

    Hi guys,

    Just removed the Concert HU from my '98 A4 Avant. I've not used a harness adapter, just wired it in myself.

    I've wired the rear speakers into the normal Sony HU wires and put the OE Amp feed onto the AMP Remote wire from HU.

    I've got sound coming out of all speaker inc OE sub. (will be fitting my amp and sub at somepoint and removing the OE amp and sub)

    I keep getting a loud crackling noise through the rear speakers and amp only. It's like a spike or surge. Very annoying as it distorts the sound of the music when it happens. All wires are nice and secure etc.

    Any ideas what is causing this spike? I've turned the bass right down and it still does it.

    Cheers,

    Dan
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

    FOR SALE - Eibach Pro Sport springs for a 2.5 V6 B6/7 PM ME.

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  3. #2
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    Probably because you are feeding high level speaker outputs into the OE amp, you need to feed the OE amp with low level pre-outs (the rear RCA's from the Sony, not the rear speaker output.
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
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