Question KRK Rokit 5 - static noise issue

Oct 11, 2021
I have one pair of KRK Rokit 5 monitors and both has a static noise issue, resembling a noisy saw/PWM type tone in the lower mid frequencies.

I would instantly think the problem is the non grounded outlets, but the strange thing is that one of the monitors noise is constantly a lot louder than the other, no matter where i plug them into and no matter if they are connected to a source or not.

The other odd thing is that the noise decreases in volume gradually some minutes after i turned them on, from ear piercing terror to just a bit annoying.
Almost like the speaker needs to warm up?

Could this perhaps be caused by a broken capacitor in the power supply of the one that makes the most noise?