Audio Quest Niagara 5000

I’m very interested in purchasing a AQ Niagara 5000. I’ve read and heard that there is a buzzing noise from the transformer. And on a utube video from Jays audio lab when he demoed the AQ 5000 and Shunyata Denali he said the hum from the AQ 5000 was also going through his speakers  Does anyone own AQ 5000 and can tell me how bad the hum is ? Also this is a power conditioner / surge protector. But I’m really wanting it for the power conditioning. If there is a hum from the transformer and it’s supposed to take all bad dirty electricity from your line why would anyone want this power conditioner that the transformer hums and u can here it from up to 2 ft away.