Subwoofer Footing - Connect or Isolate?

key phrase:
when flooring is problematic

Great feedback everyone, thank you. As a low cost test I ordered some Nobsound springs, though something like a Subdude is definitely under consideration. I shall report back.

Has anyone tried the  Auray ISO-SUB Subwoofer Isolation Stabilizer?  Same overall dimensions as the Auralex but made of slightly different materials.

With that sub you will probably only need 3-4 springs per footer. This will leave you with 12-16 springs left over, enough to make another set of footers to use under another component. You can make additional footers from MDF, acrylic or wood. Drill some 1/4" divots the way Nobsound does to hold the springs.

The improvement from under the sub will be okay, not nearly as much as Townshend Pods but at least as good as other stuff mentioned. Combined with using the extra set under a CDP or whatever you will find hard to beat for $30.   

You do not by the way have to put them under the existing factory feet. They can be used just inboard of that, and with a spacer can wind up with almost exactly the same height above the floor as now.

Here is a little one up on the 30.00 spring packs.

Get the spring load right, about 1/2 compression on the springs no matter if you suspend the whole piece or just one side of it. The side closest to the wall I have on a silicone snubbers and springs the inside I have on springs and perches with gummy puffers (30.00 model)

https://www.ebay.com/itm/274400620548?epid=801363065&_trkparms=ispr%3D1&hash=item3fe38d3004:...

I use the term "gummy puffers" because that is what it translates to.
Memory foam ear plugs. Take one per spring, roll it, install it, and put the top back on. Add sorbothane top and bottom.. Same thing on spring suspension TT add gummy puffers..

Now we have good dampening to boot. We are stopping vibration and bringing the decay rate close to ZERO from the box to the floor. That’s the real trick. Is the room still acting like a Ricochet Biscuit?

It really effect a transport, turntables cone drivers (with VC) or any valve based gear. Valves don’t like to be shaken. EVER. Neither do Voice coils.

like I said before some people like tactile bass shakers.. Some people like panel exciters. I personally do.. they are fun.. Bass shakers NO. You can shake the walls down if that what you wanted to do with the HE sub drivers and powerful amps available today. I use 15 and 18" with 22mm XMax. 90 or 91 efficient.. I don’t need NO STINKIN’ SHAKERS at all.:-)

Friday, time for a little Boom Boom..

Hat on the floor, as I slowly walk around to the beat of the music and my faithful dog follows me. I STOP. and we slowly back around the hat to the beat of the music.. Olay Amigo!

Time to feed the chickens..