Connecting C4 media to bluetooth system in hot tub

[drmark12pa]

I just installed a Bullfrog hot tub with Bluetooth stereo installed.  The unit inside the control panel of the tub has left and right RCAs which I presume are inputs.  My question is how can I connect my Control4 media library to this Bluetooth unit using the RCA inputs so I can stream from my music library or even from my Sirius internet unit through the hot tub stereo system?

[Home Theater Advisors]

I can think of a few options off the top of my head:

1. Pick up an airport express and airplay to it (not really a c4 solution though)

2. Put in an EA3 and use the analog audio out (or an older, less expensive controller if you can find it used)

3. Speaker point

4. Again, not strictly a c4 solution, but a heos preamp or sonos connect

[drmark12pa]

Does a wireless speaker point just connect to your main controller wirelessly  any further hardware needed and steam any input audio sources your C4 has installed?  Will i need additional hardware to send the audio to the speaker point?  My main controller is an EA5 and most of my audio is output through my C4 8 zone amp.