Originally Posted by MrEastSide
No, I have no evidence. However, common sense would say, having a sensitive electronic device with tons of small circuit boards, capacitors, glass fuses, and other circuitry inside of it, sitting on top of a sub, constantly slamming out heavy vibrations, certainly can't be the best idea in the world. You could store a stack of dishes on top of your sub too or some glassware... Would it break or damage anything? I don't know... maybe not... but does it seem like a good idea? Again... I don't know...
Just out of curiosity, how much more intense are the vibrations an avr may receive with it being placed on top of a sub vs. on a shelf about 2 feet from a sub (as is in the case of my set up)?
I would think that the receiver would be fine atop the sub, though I have never needed to place mine there. The only way i think it might be harmful is if you have a lighter weight sub on a wooden floor that likes to dance around when pumping out the low notes. The receiver could then be sufficiently jarred affecting its performance or longevity.
In my room listening to bass intense content at higher spl levels i can feel a certain amount of vibrations pretty much affecting every thing in the room, from the sofa, to the walls, to the lamp, to the pictures hanging on the walls (been known to knock a few off here and there) to the tv and audio stand etc. FWIW, my room isn't treated (yet) so the level of vibrations affecting everything in the room may be exaggerated to some extent.