Subwoofer Footing - Connect or Isolate?

I have.  Huge difference in the system I heard it on (the one in the video posted earlier).  Amazing what it sounds like isolated from the floor and room structure.  This was build by an acoustics expert whos quite popular in the US and builds the best mastering rooms Ive ever heard. 

I like oldhvymec, cool story about the big generators.  I was thinking of a hotel I visited recently with back up generators out back on big concrete pads so maybe it was more than concrete?
brad
    

Spikes; definitely not springs. 

I can assure you it is not uncommon for some here who will not be named to post solely for the sake of posting and to garner attention for reasons unknown and with absolutely no regard for Truth or integrity. It should surprise nobody that this kind of thing goes on all the time in forums like this.

Spikes; definitely not springs.

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Yikes, I've never seen a place where they worked. There is vertical and horizontal, vibration control. There is also From and TO the source. It's  difficult to make points work on both plains and variance of the two..

Have you EVER seen any type of power plant that wasn't isolated. I've never seen one. You ever see one on points? I haven't!

LOL Kinda like steel wheels they never did catch on.. Maybe a BIG  dimple roller.

Every time it's a gummy puffer (soft mount) with a hole through the center and longer bolts with washers and springs, on either side of the mount sandwiched between the gummy puffers. You back up and slam it forward or forward and slam it in reverse, the spring compress, while the mounting plate is between silicone wafers. Pretty tough!!

You should see what happens to a typical 4 stroke diesel (5-15 liters) engine that loosed the integrity of a harmonic balancer. Break in half!

You can't make it solid enough, but you can make it soft enough..

Regards

I discovered early on that placing my Velodyne HGS-15s of Auralex SubDudes really improves their performance.  I do enjoy that subtle more felt than heard experience when a large pipe is played by the organist.