Are you using your phone as a hotspot by itself or do you have it usb tethered to a router? If you have a router capable of using a tethered usb connection as a WAN connection, then you can use that router to change which 5Ghz channel you are broadcasting your WiFi on which might get you in a range that doesn't have overlap/interference. This option would also allow you to hardwire devices directly to the router which would then be free of wireless interference. This is the first thing that comes to mind for me as you're not going to be able to switch whatever channel your wireless subwoofer is using if I had to guess.
TheLynxDr reacted to Runesmite in Soundbar interfering with wifi
