2006 Audi A4 B7 Rear Speakers no sound

[Darren_J]

Hi Guys,

I've been searching for a good while and I still haven't found a good solution for my case, that's why I'm posting here.

First of all, the rear Amp is powered, which isn't the case for many of the cases out there.

I am using the original Symphony II, not an aftermarket head unit. Stock cables as well.

If I tap my headphone input from my phone to the LINE OUT GND, LINE OUT L and R, there is sound from the rear speakers at maximum volume, which means that the amp works.

When not connected, or playing the CD/FM, etc, there is only white noise from the rear speakers, which means that the amps are powered but there's no line-in signal.

I wonder why the line-in doesn't get through to the rear because my front speakers are working just fine.

Hope to get some insight from you guys.

Thanks for taking the time to read it!

[Bamared]

I was Reading, if you have some aftermarket Bluetooth installed, some of the kits mess up the rear speaker outputs.

[Darren_J]

Thanks for the reply - I have nothing aftermarket installed though, it is all factory.