Stacking gear no more rack space does it affect sound quality


I've run out of room for my gear. Since I started streaming i have run out of rack space and began stacking. I bought some of those brass disc long ago for putting on top of components for damping and was told by seller not to use to many it will dull sound. Now I have my preamp power supply on top of preamp and dac power supply and dac on top of preamp power supply 3 high. Streamer on top of phono stage. I have another dac on top of streamer. I have 3 racks 2 shelves each between speakers, total six shelves. Do other people do this and does it affect sonics. I don't even have room to take things off to try without stacking, to much crap plugged in.
paulcreed
Keep the digital with the digital and the analog with the analog gear and you should be ok and please get rid of any discs and footers they will only thin out the sound too much a good rubber foot is all you need.
For anyone who is concerned about EMI/RF noise radiating from a component and affecting another one, you should realize how EMI/RF radiates. Unless the component generating the noise is fully sealed, EMI/RF will 'escape'. A good product design will take into account the generated noise and will deal with it as part of the design, not as an afterthought. Half measures, DIY approaches, etc  simply don't work with radiated noise .
And heat does not necessarily kill components as long as you keep the minimum required clearance and / or ventilation around the component. Of course you should not block ventilation slots. There are many components designed to operated at very high temperatures. 
greg_f - Have you ever done failure analysis? I was a Failure Analysis Engr. and worked in screen rooms... Duh!