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Aftermarket unit into B5

Discussion in 'In-Car Entertainment' started by acf8181, Aug 23, 2011.

  1. acf8181
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    acf8181 Member

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    [Aug 23, 2011]
    Ok, finally managed to remove the concert and got my new unit plugged in using PC6401 adapter. At first didnt get any rear speaker sound but quickly worked out i needed to connect the blue wire to my HU's amp switch output.

    However, the sound still sounds a bit odd from the rear, not quite as good as it did with the concert....i may be going mad but i think i remember reading a thread on here (that after half hour of trying to find i can't) where it says it will sound not so good due to the rear speakers running from the HU speaker outputs rather than rca's....is this correct? If so shall i just get a rca to speaker output adapter and splice that into the loom so the rears run from the HU rca's?

    Hope that makes sense
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  3. acf8181
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    acf8181 Member

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    [Aug 23, 2011]
    Oh, its a 99 model non bose
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  4. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Aug 24, 2011]
    No it won't sound right because the rears have their own amp, so by using the 401 adapter you are feeding the rear RCA's into the feeble 2 x 20w Nokia amp, whilst the fronts are getting a healthy 2 x 50w from the HU's internal amp. Far better to rewire the rears directly to the HU and bypass the poxy thing
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  5. AR-rkon
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    AR-rkon AllROOOOOOOOOAD!!! Staff Member Moderator Regional Rep

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    [Aug 24, 2011]
    As andy has said, either replace or bypass the amp...
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  6. acf8181
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    acf8181 Member

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    [Aug 24, 2011]
    Gotcha.

    Is there not a rear sub as well?
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  7. S4_dan
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    S4_dan Fire up the Quattro! VCDS Map User

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    [Aug 24, 2011]
    Yes, the amp and sub are in one black plastic unit hidden behind the trim in the boot. I have fitted and Aftermarket HU and fitted my own amp and sub. Rewired the back door speakers and the sound is 100 times better. Ditch the Audi amp/sub as it's pants with an aftermarket HU!

    Easy enough to do.
    #6
    MrGrumpy30 likes this.

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