I have an ancient, circa late 80's early 90's, Sony receiver which I use in my garage. It still performs flawless. Even with all the dust and sawdust, and anything else I sprayed over the years on it. \n\nMy B&K Ref 20 is still in a closet somewhere. I believe it still works, but has some issues. Some inputs don't work and the display is flaky. The matching 5 channel amp (been too long to remember the model#) I had fixed myself a couple of times. Finally gave up on it.