when my volume was all the way down my back speaker made this weird buzzing noise, i turned my volume up quite a bit after it doing this for a while and then turned it down to see if it was still there and it was gone, is this something i should worry about or take it in if it comes back?

 

You heard thebuzzing noise when you were sending no sound to the speaker?
Sounds like it might be just a wiring problem (loose wire causing a buzz)

 

Its could be loose wires like brrman said, but it can be a blown output on the back of the head unit, or moisture got into the speaker and caused corrosion in the connector. Both have happened to my Z32.


Do A4's come with a facotry amp? if so, that could be another culprit.

BTW: Nice Sig, thats cool stuff.

 

no i have two amps one powering my subs and one powering my speakers