The Classe seems to have some kind of static sound that crops up occasionally.
In that case, you might open it up and see if anything is loose (ground wires). One thing you can try is to twiddle the pots on tuning potentiometers....over time the contacts can may not be as good - giving it a twiddle may be all you need. (just remember the exact pot position - so you set it as before!!) The other thing to look for would be for damaged or old caps. JUST BE CAREFUL - power supply caps on this baby may have 100 VOLTS stored in them (for a long time after you unplug it). BTW... I have fixed a number of consumers items this way. The last amplifier I built was for a subsea instrument project with Woods Hole Oceanographic Institute - while I was a student - in another life - so although I am no electronics technician I a not afraid to look under the hood!!
I have no idea what it is nor do I want to pay the $100 each way to mail it to Montreal and have Classe bill me $75/h to fix it (I contacted them and that is how much it costs).
That sounds quite reasonable to me. Did you ask them if they can estimate repair cost after 1 hour work and get back to you? It ain't rocket science. It is quite likely they can fix it and fine tune it for you. After many years the bias and gain may need adjusting/tweaking anyway.
When you buy a product like this (like a Rolex) it is good for life, IMHO. You just need to maintain it. This is not your typical disposable amp from Best Buy...