Easy (wireless) way to connect speakers to ceiling mounted projector

[Klasta]

I'm moving into a new appartement this summer and I wanted to install a projector (BenQ W1070) on the ceiling with a chromecast 2 to stream netflix and stuff from my tablet.
I just can't figure out how I would connect my bookshelf speakers to the projector without running wires all over the place.
Is there a way to cast video to a regular chromecast while casting the audio to a chromecast audio or maybe an easy way to use wireless transmitters and receivers?

Thank you in advance!

[robbivip]

http://www.ebay.com/itm/2-4GHz-Wireless-Stereo-Audio-Transmitter-Sender-Receiver-with-3-5mm-Stereo-RCA-/271518460597?hash=item3f37c2eab5:g:tmcAAOxyN05Tln-j

 

You can find these and others that are similar on ebay. Could probably get them for cheaper than this if you look. Didn't check amazon.

[Klasta]

On 4/17/2016 at 3:01 AM, robbivip said:

http://www.ebay.com/itm/2-4GHz-Wireless-Stereo-Audio-Transmitter-Sender-Receiver-with-3-5mm-Stereo-RCA-/271518460597?hash=item3f37c2eab5:g:tmcAAOxyN05Tln-j

 

You can find these and others that are similar on ebay. Could probably get them for cheaper than this if you look. Didn't check amazon.

Thank you!