Lehmann Audio Black Cube crackling in the acoustics

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.

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.

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.

Are both circuits on the same side of the breaker panel? If so have one moved to the other side and see if that cures the problem!

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.

Ah, I meant the power circuit, not the network. If there is a noise when the fans in the bathroom turn on it might be transmitted via the power supply. Some people go as far as to use a separate circuit from the panel to the sockets supplying the audio gear to avoid that.

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

Is this a new problem and things previously worked in that house? If so, not household wiring. If present for phono only, but not other sources, it comes down to table, cartridge, Cube. If other sources, amp should be included in suspects.

If present since you moved in (you say wiring is new): Is the hi-fi on the same household circuit as the fans? If so, consider a separate circuit for hi-fi.