Posted by Trevor Black on December 27, 2006 at 19:40:20:

Has anybody upgrade a Discovery (2003??) sound system to the optional Harmon Kardon system? I would assume that the wiring harness & connections would be there for the sub-woofer in the rear door (& all the speakers) but what about the head unit & amp? I'm sure someone has at least tried? Give me a shout!! Cheers!! -Trevor