When I got my 96 A4 T Sport it came with an aftermarket radio. This has since been binned and I have fitted my trusty Alpine deck. When I connected the magic box to allow me to keep the Audi amp for the rear speakers I got engine whine through them. I have added a nice set of Focal components to my front doors and a pair of 12" Kicker subs in the boot and it all sounds rather nice apart from that damn whine on the rear speakers. I intend on adding an amp to get the most from the components up front and was hoping to just add some better rear speakers to give me some fill and the back seat passengers some melody. Any ideas before I just rip it out and run some fresh speaker cables straight from the deck?