Kondo Overture PM2i - buzzing noise from transformer

Thanks astolfor, I had an intensive and very helpful communication with Kondo Team in the meantime and we did several measurements with a certain app to measure noise in dB. Laying the iPhone on the buzzing transformer on my and their Overture made things clear. My Overture produced even 6.6 dB less noise (32,6 dB) than their 39.2 dB. So I guess my ears are just too sensitive.

Transformers should not be audibly buzzing. It is not normal. If that were true, all of your transformers would be buzzing.

Hi chayro, well Kondo sent me a photo with the iphone and "NIOSH SLM" app positioned on top of the transformer of their reference Overture amp showing 39.2 dB. I used the same app with same app settings and mine was even quieter at 32.6 dB. Now what does that mean..?

It means that Kondo is saying your buzzing is within their specifications.  If you bought it new, you should contact your dealer.  You should not have to put up with anything annoying in a product that is so expensive.  Very unfortunate.  

Yeah, you are right. I will try to trade in to the Overture to replace it with the Melius power amp.