Welcome to the Whitehawk family. We bought ours at Teds also. We were very happy with the sales and service of Teds, they are great people. As far as your TV speakers, yes you can get the sound thru all of the speakers, all you need to do is select which speaker configuration you want on your stereo. Ours is a 2014, but I would think they should work the same. Enjoy.
2014 Jayco Whitehawk Summit Edition 28 DSBH
2013 Ford F150 XLT Crew Cab Ecoboost 3.55