Kondo Overture PM2i - buzzing noise from transformer

Thanks vinylvalet. Bolts are tight. Tried different AC lines - at home, at company, without HMS DC filter, with HMS DC filter. Buzzing all the time. Mavbe I am t sensible concerning side noises.. 

You need a better AC power conditioner. It's possible that it's the transformer, but I would put my money on DC on your AC power line. There are good DC blockers and not so good, best wishes.

Call Audio Note.

In my 1990 OnGaku, which I play a lot, last year slight hum started and I ended having to replace the transformer , I am glad I had a couple original.

You are lucky you can, and should, call Audio Note.

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.