09 WrX here looking for help on installing the factory sub. I have been told the harness is there under the driver seat to plug and play but I can not seem to find it?? any help would be great, oh and to remove the face plate bezel on the HU was easy what is with all the fuss. I 'am in the process of adding the Ipod interfase along with the sub so If I need to run a new sub line I will do these together but the sub showed up first.**** any help would be great ***** Thanks D