I have indoor/outdoor wireless speakers and I'd like my audio receiver's music to play through them. The broadcast unit for my wireless speakers has a 3.5mm input. I converted the earphone output to 3.5mm with an adapter and that works well. However, when I do this, the music doesn't play through the audio receiver's speakers inside the house. My question is: Can I attach red aand white RCA connectors to one of my sets of speakers behind the receiver and convert the RCA to a 3.5mm to fee the broadcast unit?