Lehmann Audio Black Cube crackling in the acoustics

It is currently not possible to create a dedicated power line. We need some new solution. I replaced the fans with lower power ones, but the problem remained. A crackling sound, like a shot, at the start and when the fan is turned off. The air conditioner filter distributor is most likely not a solution to the problem.

Yes, the system is connected to the same home network, I just used a MM cartridge before. I upgraded and this problem appeared . But the air conditioner and kitchen hood cannot be heard to start

Thanks, I'll do a test. But it’s strange, I bought a Chinese 18W fan with a control panel, plugged it into the wall and everything is fine, no crackling in the speakers. In all likelihood, it has a “soft start”. But the problem is that it starts only from the control panel.

I tested all the wall outlets in the house, they are connected to different terminals in the main distribution panel. Result: crackling everywhere. I asked a neighbor to participate in my test; in the next apartment I also heard a crash, but a little quieter. But it does happen! The drawn line from the main shield is also doubtful. I'm at a dead end. Connect wires from a pole on the street? I don’t know what to do, sell the MC cartridge and Black Cube? But I like this sound and I'm already used to the wonderful sound of the audio-technica MC AT33EV.

Maybe this will be useful to someone.
I connected an EMI filter in front of the fan and the problem completely disappeared. The photo shows a draft version.