A little BT information. The KS9’s will only hook up to one BT device at a time and re-pairing becomes tiresome. So commonly the HA’s are paired to your smartphone, a requirement for the Easyline App. to work anyway. So if you are steaming say music from your phone, you can do a long low push to mute the surround, you can not mute when talking on the phone via BT. So for everything else, the TV, Stereo, computer, etc. the TV Connectors are the answer as they will link to the HA’s by a simple button push on the TV connector, and stream the sound, different than BT. I have 3 TV connectors and going from one to the other only requires you to link with this button push, once you like the sound volume, you can then Mute the surround sound. A little experience with this is all that is required.