Placing components on solid flooring vss rack

I recently experimented, like I do often, and placed all of my components on solid wood flooring, which is concrete underneath. I immediately noticed a significant improvement in virtually all aspects of sound quality. More focused presentation, bass is more solid/tight, and better sound stage.

Perhaps my audio rack is quite inferior and not as stable as I once thought.

In addition, since my rack is now vacant, I placed my subwoofer on top of the rack. Again, the audio improvement, this time in sub-bass, was not subtle, the room is better pressurized at lower volumes.

Needless to say, I was astonished by the results!
Well, it appears that the mass loading of placing your components on the solid wood/concrete floor was better than what the rack did for you. This is a reasonable possibility given your floor construction. However, for the same reason, the subwoofer should be better placed on the floor than the rack. The conclusion I would draw is that the subwoofer feet are not as good as the rack's feet. Does the sub have little rubbery type of feet by any chance?
Yeah, the subs feet are thick rubber. But I did the reverse with the sub; I removed it from the floor and placed it on the rack and got better results I think due to its being higher up.
Yes, that's what I'm suggesting. Putting it on the rack possibly produced greater stability than having the sub with its rubber feet on the floor. It's feet aren't copupling it to the mass of the floor as well as what is occuring with the other components. The other components are better coupled to the floor than to the rack. The sub is better coupled on the rack than on the floor. My first thought is that this would be due to the feet on the sub. Now if this hypothesis is correct, then if you put the sub back on the floor, but on spikes or cones, it should be better than using either the rack or placing it on the floor with its current rubber feet.

Height shouldn't be the critical variable. The frequencies produced by the sub have large wavelengths. So putting it on the floor or a foot or two off the ground should not make a difference in what is happening given the size of the wave. So I'm thinking it's a stabiilty issue, not a height issue.

These are all just speculations based on the facts so far.
Do you have tubes or a TT?

These can both suffer from micro-phonics....especially if you place the amps in the same room as your listening room or in a corner. Seriously these should be kept in a separate room (if you listen at realistic levels). Most other stuff is relatively immune (if it was designed properly from parts that are not micro=phonic).
BTW- it is relatively easy to identify offending up the gear in question and tap the components individually with a pencil (very gently of course and be careful to avoid electric shock) - you should hear nothing out the speakers. (Obviously you can't do this to a TT cartridge or a tube as it will clearly make plenty of noise...but you can use this check for other components that may be causing a problem and where a manufacturer has used microphonic parts and shouldn't have)
No tubes, (at least not yet), all ss gear. I can certainly understand micro-phonics in tube gear, but did not think it would affect ss gear as much as it appears to in my case.

To clarify; most noticeable is when I play an LP, although there is still improvement from digital playback - even wireless feed via A.E. to dac.

I also re-placed my sub back on the floor. It was just an experiment after all. Rather unsightly on top of a rack.

My conclusion is that my rack is simply not up to par, which explains much in the way of so many options for amp stands and the like.

Everything on the floor, though is actually kind cool! I'll post pics on my virtual system.
I bought 1/2 inch thick hardwood wood and placed my components on the wood with iso footers under my gear. Might not look the best but I too noticed a improvement. I wanted to do maple blocks for each piece of gear but I thought the prices ludicrous.
I noticed you originally had your stuff on a rack in the corner - this is about the worst place to put a TT.
Check this out if you don't believe me when I say that well built components are not normally microphonic. Crown Amp Test but don't try this with any tube amp.
YIKES! I am a believer in Crown amps!

So, Shadorne, why is the corner about the worst place to put a TT?

So, Shadorne, why is the corner about the worst place to put a TT?

Simply because this is the BEST place to put a bass have the strongest bass room modes occuring about 6 inches to a foot out from a this is not what you would want to expose a TT too.

I don't know about you - but when I play loudly many things will vibrate in the room - you can easily feel it to the touch.

I have all my gear in enclosed heavily braced MDF cabinets on the ground (which is concrete) - every amp and player is no more than 6 inches from this concrete floor. Complete wooden enclosures mean that acoutic energy is probably reduced by at least 30 db SPL inside these cabinets. If I had tubes or a TT, I would probably find a way to place them in another room - as SPL levels are often too high to be able to avoid audible microphonics in that type of gear.
When I used to own a TT and system in the same room - microphonics was a constant and audible problem - I admit that I tend to listen loud to esepcially dynamic recordings so this may affect me much more than others...
Okay, that makes sense since when I placed my sub on the left corner, it pressurized the room almost too much. I had to lower the gain.

There is definite improvement with all my components on the floor - no question. Your idea of placing them inside of an enclosure will also probably improve not only audio but w.a.f as well!

Thanks for the suggestion.
I've been listening/ experimenting with my components being side by side versus stacked. initial listening made a large improvement in may ways, as noted by EricJCarbrera. I need to do more listening but I'm told it sounds better because of the lack of interference between components. Feel free to chime in with any of your experiences!