I haven't swapped the cables because they are looped through from left to right speaker and in the wall cavity. I guess I will have to purchase a couple of new cables to test.

I recently moved into a house where a B&O system was "included in the price". It is a Beosound Ouverture connected to a set of BeoLab 4000 speakers by powerlink. There are masterlink connections to a couple of B&O TVs and other speaker locations around the house. The system is probably about 10 years old. I have connected by Logitech