I bought this Yamaha Receiver R-9 at a garage sale, it sounds great (
way better than my more recent Technics receiver) and has a lot of
features. However, it produces a humming sound on one of the speakers,
which is drowned by the music once it is played. The sound has peaks
and valleys, kinda like a windy day.
The unit is very dusty inside, should I blow some air in it or not?
Thanks for the answers.