High frequency noise in monitors

I'm using HS-5s (Yamaha) for my home studio monitors.

I'm getting a high frequency noise coming out of them anytime they're on.

I've done every method of problem solving that I can think of.

They emit the noise in my condo and outside of our building.

The noise sounds like dial up but at a higher frequency. When I've brought them to a completely different location the noise is gone.

I've tried chokes, rf filters, power conditioners, replacing all recpticles in condo, ground lift, turning off all power except for the monitor location, different power cables, removing and obviously, unplugging Wifi.

I'm about out of options other than to move out.

I was previously monitoring through headphones and passive monitors and didn't hear the noise. It started when I began using the powered HS-5s.

Anyone out there with any good advice would be GREATLY appreciated.

Thanks.

High frequency noise in monitors