Anyone try decoupling speakers from the room?

jbl 4430/4435 studio monitor have been designed for the purpose of being suspended from the ceiling or soffit mounted. the bottoms of the monitors have 4 eye hooks installed through the factory and steel bars installed in the speakers bottom and bolted to the baffle. for this application, you simply flip the speaker upside down and connect the cables and hoist! audiophile speakers are not designed like this cuz of the nonsense the magazines promote. they worry to much about how the speaker will look instead of how it sounds. so you can pay $10,000 but get $50.00 worth of drivers. with these speakers that wont be the case. mike

Bose 901s were often dangled from the ceilings.

I have had the same setup with all my speakers. Carpet over wood floor, cinder blocks on the carpet, tiptoes under the speakers (pointy side to the cinder blocks). Works great, and the tweeters are the perfect height. Remember, you want the tweeters at about ear level from your listening position.

If my speakers were taller, I'd use paving stones instead of the cinder blocks.

Good speaker stands also have a way of decoupling the speaker from the stand.

"My main purpose is to keep the floor from resonating, IMHO it works well."
http://forums.avguide.com/viewtopic.php?t=3588
Please see the link above for an explanation of Sound Transmission.
Suspending your speakers will do nothing to diminish the transference of Air-Borne Sound.
Air-Borne Sound needs to be of a high decibel value, and the correct frequencies to make your floors 'resonate'.
The Air-Borne Sound however will quite easily 'pass-through' the floor structure depending on its insulating and transference properties.

Structure-Borne Sound will be induced into the floor by both Air-Borne Sound and physical impact or vibration.
If your speaker cabinets DO vibrate sufficiently (most don't) and are directly coupled to the floor structure, they may induce Structure-Borne Sound Transmission.
If your speakers are DE-COUPLED from the floor (and this can be done via spikes OR insulating material, there will be no significant transference of the cabinet resonance into the floor structure.
If you do not in some manner prevent the speakers form moving (ie bouncing), you will be degrading the sound.
It is also important mostly, as others have written, to align the Mid-range and Tweeters with the ears in the listening position.

If the speaker cabinets waffle (light weight and not heavily braced speakers) then suspension will make a difference to the sound for sure...sound reinforcement speakers like JBL's fit this category as do thin wall cabinets such as Harbeth's.

Is it better...the eye of the beholder is what counts...