I don't know much about Echo, but these speakers seen to play at one location but on a wifi /LAN.
eg X10 (or music Server)...
>...APP...
>...Speakers (Wifi or Bluetooth)
Make sure Echo can be connected to a home network & supports upnp/dlna.
The cocktail audio wireless BF11 does the same thing but it isn't linked with a cloud service to report the weather etc.
See remark:
" Mark Phillips • 3 months ago
The big problem with the Amazon echo is there's no way to integrate with non-amazon services such as iTunes or Google Music. I can't even link it to my music library on my home network, which i can access through every PC, Mac, smartphone and tablet on my wifi. Very frustrating.
http://www.itpro.co.uk