I have a great-room layout where the kitchen and living room share the same space. it's ~15 x 30' rectangle with another room open on one side, a hallway and vaulted ceilings . Both subs are up by the receiver and main speakers (not quite symmetrical but that's where they sound best right now.). I have about 9 1/2 feet between them, they're close to the front wall and they're about 3 feet from the corners on either side.
I'd like to try putting one in an out of the way corner beside our pantry in the kitchen (or possibly another if that doesn't work) on the opposite side of the room, but I'd need a ridiculously long rca and I don't want to have it running along the floor or anything. I suck at climbing around attics and fishing wires too. A quick search turned up
this. I know someone here has some experience with wireless adapters, but I dont see them suggested like, at all. Which leads me to believe it's not a great option. The kitchen is behind the seating area.