I have the same issue as you. First, I ran the cable under the floor/house so there would be no cable visible between the speakers. My wife did not want to see the wire. Used nice wall plates that the cable passed through both going down and coming back up. The long cable ended up being 20 feet long. My shorter cable is 7 feet long. No need for both cables to be the same exact lenght. I used a nice 10 gauge speaker cable that I manufacture and sell and my system sounds wonderful. No worries about uneven cable lenght. I cannot hear the difference between equal lengths and my current set up. I have done the listening tests. No difference at all.
Perhaps you could do something like this? It would be nice if the length differences were minimized as much as is possible.
You can view my system under virtual systems here.
Perhaps you could do something like this? It would be nice if the length differences were minimized as much as is possible.
You can view my system under virtual systems here.