I have a NAD receiver in the Living Room and extra speakers in the Kitchen. I want to replace the Kitchen speakers with a Sonos 5. Can the pair of speaker wires ending in the kitchen be used to supply a signal to the Sonos 5 Line In from from a Line Out on the NAD? Obviously a jerry rigged cable will need to be made with the appropriate jacks. The goal to to continue to have music form the HiFi in the kitchen, and also music from wifi source form the Sonos %.