Tube amp buzz (amp, not speakers)

Boriso,
Holographic IMO means spatial characteristics where the instruments and voices are clearly delineated. If you go Emotiva you will regret it if you value those traits I described. I found the Almarro easy to tube roll by swapping out the 6SN7; the 6SL7 not as much. It was a fun amp but the biasing was tedious and somewhat dangerous.
regards,Larry

Descent sized toroidal power transformers are usually the ones that buzz, vibrate, from DC offset on the AC mains. As a rule EI transformers do not buzz, vibrate, because of DC on the mains.

I think the power transformer in the OP’s amp is a bobbin transformer. I couldn’t find any info on how they react to DC offset on the mains.

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Thank you all so much. I don't know the first thing about electronics, so it seems like I have two options: getting an Emotiva CMX-2  or taking it to a technician, at least for a comparable cost if not more. What would your inclination be?

This is another one that is known to eliminate DC offset transformer hum

https://avahifi.com/products/humdinger-dc-line-blocker

Well, after all, the AC is 60 cycles. Hmmmmm. The other troublesome thing about transformers is the rather significant magnetic field they produce.