I decided to fix it myself, I was reading that noisy coils are not enough reason for warranty repair.
So I put some nail polish inside syringe and with small needle ( I have cut first the beginning of needle so it wouldn’t damage coil) and I stuffed the coil till it began overflowing.
And after it settled around hour later it was almost noiseless and next day ( today ) can’t hear the coil at all even at close range.
No idea why Mikrotik decided to ruin like that new product, I would gladly pay that 1$ more if they put there some nice noiseless coil.
Can you give a more details photo how you do this. In what hole you put needle? I bought router with same problem. I want to fix the problem on their own.
I will be grateful for the help. I think many peoples interested in this.