Unplug all the inputs and see if it still hums. If not, you might be hearing a humming phono input or cables that are picking up electromagnetic noise.
Sure sounds like a transformer buzzing☹️. Bummer, I would pass. But that model is such a tremendous amp… I really recommend finding another. That is the kind of product that can change your audio life and every purchase in the future… in a good way.
For what it's worth. I have a halogen light set up on top of my TT with two settings. One medium light, the other one full bright. Bottom line is set on medium light I get a buzz from my amp but when switched to full bright, the buzz completely disappears. Don't ask me why, that's just how it is.
I did, im staying with the Vandersteen model 2 sig3 for now
Cool. There was a time a couple of years ago when you could buy a ref75se and a ref5se for a combined price of between $10,000 and $11,000. That was a great value. Today that combo will set you back aproximately $13,000. If you are dead set on that direction, you might reach out to Paragon as they likely have some ref75se’s new in box for a little more than you are looking at preowned. It would have a warranty and it is an end game amp. I drove Wilson Sasha 2’s and Devore O96’s with mine and it was sublime. You will hear your Vandersteens at their very best. You will also have an amp that is far, far more capable than your speakers but thats ok. Buy the best preowned ARC preamp you can afford…a ref 5se, ref 6 or 6se…even a ref40 if you can swing it. You will have your amp/pre for the long haul. When you someday upgrade your speakers, the electronics will scale. You wont have a wonderful match but it will be very good. You wont have tremendous synergy or volume headroom but it will still be very, very good.
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