French... Yea, you need a receiver that can accept/decode the AC3 signal from your FTA receiver. If you want to use just stereo from your JVC amp - jus use the red/white RCA cord from the back of the FTA receiver to the JVC - but it will only be stereo and you may have to tell the FTA receiver to output L/R stereo and not AC3/DD somewhere in its setup menus.
If you want a cheap/reliable DD amp - look into the lil Accurian # 2647051 amp that Radio Shack sold. I used one for several years, now at my moms - it is a nice lil amp, search Ebay or craigslist. Then jus hookup a optical/digital coax from the FTA receiver to the 6.1 amp and enjoy.
Another lil setup is to find a used 500-watt Logitech Z-5500 THX surround system. It has both optical/digital coax connections. I use the subwoofer with its plate-amp in my livingroom setup using my own front/center/back speakers - but the lil speakers that come with it sound great in a smaller room - it does the job well for a budget system - the lil subwoofer really performs.