Hi, I'm trying to get better coverage to fill this room with sound. The audio coverage and volume is great in the couch areas but not so good elsewhere without really blasting the couch areas. What about putting another Wiim system on the ledge area on the left above the first door (next to bench) and sync'ing them together? I think this might be a bad idea if sync is not perfect. Would it mess with the audio quality, perceived or otherwise? It's not practical to run cables under the floor. Thank you. I love the Wiim Ultra.