I build an isolator system for my couch to prevent vibration from getting into the apartment building structure. I snapped a few pics for you guys showing what I did...
I took some scrap MDF and cut two pieces to the same size as my couch feet. I cut up some aluminum angle iron into 6" pieces and screwed it on to each side of isolator foot to hold the MDF square on the couch foot. I drilled a 3/8" hole in each side of the isolator foot to mount the metal plug. I used fender washers to prevent the mdf from blowing out, and lock washer to keep the bolt from backing out. The isolator plug fits in the rubber piece, and the rubber piece fits in the polyethylene shoe.
While I was painting I had some music playing at moderate levels. Without the isolators on there the entire room shakes, and the deck outside shakes. If I turn it up the lights in the room begin to vibrate. Once the couch is suspended up on these rubber mounts the vibration felt in the room is almost non-existant. You can sit on the floor right next to the couch and not realize that the shakers are on. If you put your hand on the couch, the thing is ROCKIN! Not bad... cost me 30 bucks for the isolators, about 10 in hardware and aluminum, and .99 in paint
I also picked up a small skillsaw circular handsaw for 30 bucks on sale. I love power tools!
isolators were sourced on e- bay auction 140116111572 - but are also available on amazon for just under 50 bucks for 4- search for "KNC Homeshop HSCB-125/4"
Keep in mind these are virtually the same thing clark synthesis sells as their top of the line isolator for $60 EACH!!! (down to the "kinetics" wording on the rubber). The only thing that is missing is a stupid piece of angle iron with two holes drilled in it.