i had an alpine 9807headunit installed in my 2001 a4 for some reason i cannot here any radio stations they come in really static, i thought maybe the guy forgot to connect the antenna wire checked that it was fine i checked almost everything i even put the stock radio in to see if he messed up the antenna or amps anything and it worked fine maybe someone has a suggestion what to check maybe he didnt give power to a certain wire anything i dont know please help its been driving me nuts i appreciate all the answer i can get thank you

 

The antenna is active, so it needs power too.

Any well stocked Car Audio shop should have an adapter for the Audi antenna.