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Thread: BNS 5.0 headunit preouts?

  1. #1
    sliced's Avatar
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    BNS 5.0 headunit preouts?

    Hi just wondering does the BNS 5.0 headunit for a 2006 a3 have preouts for a sub?

    Whats the best way to connect rca cables from an aftermarket sub?

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    Yes all Audi HU's (apart from the very lowly ones) have front and rear pre-outs, they are detailed on the schematic on top of the HU. They all need to be able to drive the Bose system (if upgraded) so this is why they have to have line outs. They are not on a standard RCA connection though.
    On the non Bose system the easiest way to drive an amp for a proper sub is to use the rear pre-outs and remote on already going to the stock tupperware sub behind the passenger side boot trim.
    You can't unplug the connector though as the amp inside the stock sub also drives the rear speakers, so you need to use wire taps or similar to get the left & right signals and remote on trigger.
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    I used a Hi-Low converter and tapped into the speaker wires behind the headunit. I know there is a rear amp for the 5.0 (mine is non-bose) and I think there is a x2 20w amp in the HU itself. Haven't had any probs with my converter so far and it does the trick.

    A4 B7 Cab Audio Upgrade...

    Line Out Converter-Hi to Low level(RCA)Output 2 channel | eBay

    Car: 2007 A4 3.0TDI Quattro S-Line Cabriolet
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    sliced's Avatar
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    Wicked, I didn't have to go anywhere near the headunit, managed to tap into the feeds from the existing non Bose sub in the back.

  6. #5
    jjmurphy21187's Avatar
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    Would've been easier/neater if I could've done that but the extra panels in the boot due to the soft-top meant I couldnt get at the amp... not with the amount of time/effort I was prepared to put it!

    Was there a remote turn-on output from the stock amp which you used??

    Car: 2007 A4 3.0TDI Quattro S-Line Cabriolet
    Mods: Pipercross Panel Filter, Smarttop, LED Plate Bulbs, LED Interior Bulbs, Blue LED Needles, Remap, EGR Delete, Custom Stainless Exhaust (4" Slash Tips), Cupra-R Splitter, Embossed Number Plates, 19" BBS CH Reps & Vredestein Ultra Sessanta's, 12mm TPI Spacers, -30m H&R Springs, MTEC Black Edition Brakes (Dimpled & Grooved), Mintex Pads, RS4 RARB, Vibe Square Subwoofer in Ski-pass & Alpine MRP-350 Amp

    VCDS - PM for details (East Midlands)

 

 

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