Cary SLI-80 vibration

I have a Cary SLI-80 Sig that has vibrations that can be felt on the front knobs as well as the top of the transformers and the chassis. I had the power transformer replaced by Cary and that helped, however there are still the vibrations. The speakers are picking this up- I get a distinct hum from the woofers about 1 foot away.

I took it back to Cary (I live close by) and the Tech (Gerald, great guy) brings me to the back and put the amp on their test bed. That's customer service. Everything is biased, we moved some tubes around (EH KT-88s) but still the vibration. Everything else looks great.

Well guess who comes over to ask what's up? Dennis himself! So we talk and he says, bring this thing to my test bench. The tech says, you're getting special treatment. Don't I know it!

Dennis hooks it up, listens, looks, and says the amp is in spec. Nothing wrong with it. I say yeah, sounds great, but those darn vibrations. He says everything seems to be in order, we talk about the EH tubes, the sound, and that's it.

Should I expect the vibrations or just live with it?

I respect Cary Audio and everyone that works there has been very pleasant and gracious. I would certainly purchase another Cary product- I hold nothing against them.

I am not the original owner and the amp is about 2.5 years old.

Thanks-
Skot