"Glenn Richards" wrote in message
...
Tim S Kemp wrote:

My first instinct would be to rip out the factory head unit and
replace it with something decent,
Make sure it's compatible with any out board amplification - as the
system has a sub it may not be straightforward.

The stock system in my A4 has a sub, 8" mounted under the rear shelf.
This is powered from the same amp as the rear speakers.

Not quite sure why Audi have that arrangement, surely it would make more
sense to have the front speakers amplified as the sound is a lot better
from an offboard amp.

Only thing to watch with this arrangement though is that the stock head
unit drives the "line" level at 9V RMS (standard line level is 2V RMS).

You will find 4v and very recently 6v line outs are becoming the norm on
'proper' kit.

Tim..