He’s just an A@#hole. First move was to connect to the core (I didn’t realise this defaults to allowing all bluetooth connections, I don’t use bluetooth, sorted that out today) and blast music at 1:30AM. After I disconnected the core, music started coming out of the speakers again, though not as loud. I assumed this meant he connected them to a WISA TV. They are connected via powerlink, and are set as left and right, though I haven’t found any documentation that states this disables WISA. He wouldn’t have been able to connect any other way, as I unplugged the core and that’s the only thing connected to them.
We aren’t in the same building, but have a common wall. I know who it is, as his phone connected via bluetooth as [NAME’s] Phone.
I tried to talk to him, but he didn’t answer the door today. I might find it funny if I didn’t have small children who were terrified.
I’ll try talk to him tomorrow, let me know if you have any ideas, and thanks as always!