I agree with Talon, my dad owns the Ref3 and while there has been alot said about it your experience isnt the norm, Seeing how you bought it used the only hour count you can trust is your own, invest in new tubes and reset number, maybe note the old count for a total hours of use record.
My sather had some noise on his and as he bought a dealer demo (saved over 3K) AR sent new tubes for free.
My sather had some noise on his and as he bought a dealer demo (saved over 3K) AR sent new tubes for free.