1.5" Sorbothane Hemisphere Rubber Bumper Non-Skid Feet with Adhesive 50 Durom, 4 Pack

I have these under my Left & Right Def Tech 8060 towers along with my Def Tech 8080 Center Channel, all 3 contain a powered sub & duel bass radiators. The way I did it was to custom cut two pieces of 1/2 inch plywood to fit the base of my particular speakers and painted them black, then I sandwiched the sorbothane in between the wood and set my speaker on the top piece of plywood. This keeps the product working as intended but also keeps the sticky sorbothane from touching my speaker or the floor. Plus, I can always move the speakers around the room if necessary and never damage the sorbothane or my floor. The "Isolate It" sorbothane hemispheres did such a fantastic job of isolating the vibrations from the speakers that I bought more for my new SVS PB1000 sub woofer. I cut and painted two more pieces of plywood, sandwiched 4 of the 1.5" sorbothans between them and as expected, total isolation, it's like it's floating on air and I only hear what I'm supposed to hear which is the movie. Make sure you get the right durometer to properly support your speaker or sub, if your not sure, just call them and they'll tell you exactly which one is for your application. Be aware, these do not last forever, they can dry out after a few/several years and will have to be replaced at some point. But they're so affordable and do such a great job, I couldn't care less.

These are great for isolating sensitive electronic components, you will eliminate 99% of the vibration. The Sorbothane is very gelatinous-feeling and will stick to smooth surfaces, which is a consideration if you are putting it on top of delicate wood furniture. Also the pads have a mediocre adhesive which may not hold them onto you equipment if it is moved around a lot. Otherwise, these things are a great invention...

இ ԲμⓏʐᎽ ധƱ௨Ẕყ Rating:ѾѾѾѾѾ Highly recommended with warm fuzzies!The 50-durometer hardness rating of this product is halfway in firmness between the softer 30-durometer Sorbothane bumpers and the firmer 70-durometer Sorbothane bumpers. Sorbothane is a synthetic viscoelastic urethane polymer with excellent shock-absorbing and vibration-dampening properties.I have two 17-inch laptops and their fan intake vents are located underneath the laptop. The fan intake vents pull air in from underneath the laptop and the warm air from the interior of the laptop is blown out through vents on one side of the laptops. The laptops can get quite warm when there is a lot of extensive CPU or disk activity going on. To improve air circulation underneath the laptop and improve the efficiency of the bottom fan intake vents, I attached two of these 1.5"-diameter vibration-absorbing rubber bumpers near the rear corners of both laptops. But I also wanted these bumpers to be removable so that the laptops could still fit inside laptop case and sleeves; otherwise, the bumpers' .75" height can prevent the laptop from easily sliding into the case or sleeve. So I used sheet metal shears and cut out circles from an old software CD that I no longer needed. I cut out these circles of plastic so that they were slightly larger than the 1.5" diameter of these bumpers. I sanded the edges of these plastic circles to smooth them out. I then attached these adhesive-backed Sorbothane bumpers to the plastic circles that I cut out from the CD. Next, I cut a small square of adhesive-backed "Industrial Strength Velcro Tape", stuck the fuzzy "loop" Velcro side onto the plastic circle that these rubber bumpers are mounted on, and stuck the "hook" Velcro side underneath each laptop near the two rear corners. I carefully attached the "hook" Velcro side on the underside of the laptops near their rear corners so that they were equidistant from the rear (so the laptop would evenly slope forward), and I also positioned the Velcro so that they did not block any screws or removable panels such as the battery compartment or hard drive compartment. This is the perfect size to use as riser pads to lift the rear of a laptop up by .75". And now I have converted these adhesive-backed rubber bumpers to be removable riser pads that attach to the rear of my laptops using Velcro.The surface of these Sorbothane hemispheres feels sticky and tacky. These bumpers contain a plasticizer that can possibly leach and discolor wood. If you are placing these on wood flooring or furniture, you should insert a small piece of plastic wrap between these bumpers and the wood surface to both prevent the possibility of the plasticizer leaching onto the wood and to also prevent these tacky bumpers from sticking too tightly to the surface that they are sitting on. This is especially true for applications where you need to periodically lift these bumpers off a surface, such as my use of these bumpers as riser pads underneath my laptops. Just leaving my laptop on a desk for one day caused these bumpers to stick onto my desk surface like half-dried chewing gum. And even though each bumper has a backing of 3M adhesive, when you lift the object that is using these bumpers off of the floor, table, or shelf, the bumpers may be sticking so firmly to the surface that they can cause the bumpers' adhesive backing to pull away from the object that you originally stuck them onto. The tacky surface of these bumpers easily picks up dust, lint, and other debris, which can be an issue if a hard piece of debris is stuck onto the bottom of a bumper and it ends up scratching your wood furniture or floor. To solve this sticky issue, I thoroughly cleaned the entire surface of the bumpers and then wrapped the bottom of each bumper with a 1"x1" square of plastic wrap (cling film used to wrap food and food containers). The plastic wrap sticks very well to the bottom of these bumpers and they are no longer prone to sticking or leaching onto any surface without reducing the bumpers' vibration-dampening attributes. Some uses of these bumpers require that an object be firmly mounted to a surface without any possibility of shifting, and that object will rarely or never be moved. But for most applications such as using these underneath speakers, turntables, laptops, etc, I recommend wrapping these bumpers with a layer of plastic wrap if you do not require these bumpers to stick very firmly to the surface, and this will prevent the possibility of plasticizer leaching out, difficulty in lifting the bumpers from the surface, and debris sticking onto the tacky surface that may scratch wooden surfaces.The surface of these Sorbothane hemispheres feels sticky and tacky. These bumpers contain a plasticizer that can possibly leach and discolor wood. If you are placing these on wood flooring or furniture, you should insert a small piece of plastic wrap between these bumpers and the wood surface to both prevent the possibility of the plasticizer leaching onto the wood and to also prevent these tacky bumpers from sticking too tightly to the surface that they are sitting on. This is especially true for applications where you need to periodically lift these bumpers off a surface, such as if you need to sometimes move the speakers or subwoofer that are using these bumper feet. Leaving these bumpers pressed onto a surface for a long period of time can cause them to stick onto the surface like half-dried chewing gum. And even though each bumper has a backing of 3M adhesive, when you lift the object that is using these bumpers off of the floor, table, or shelf, the bumpers may be sticking so firmly to the surface that they can cause the bumpers' adhesive backing to pull away from the object that you originally stuck them onto. The tacky surface of these bumpers easily picks up dust, lint, and other debris, which can be an issue if a hard piece of debris is stuck onto the bottom of a bumper and it ends up scratching your wood furniture or floor. To solve this sticky issue, I thoroughly cleaned the entire surface of the bumpers and then wrapped the bottom of each bumper with a 1.5"x1.5" square of plastic wrap (cling film used to wrap food and food containers). The plastic wrap sticks very well to the bottom of these bumpers and they are no longer prone to sticking or leaching onto any surface without reducing the bumpers' vibration-dampening attributes. Some uses of these bumpers require that an object be firmly mounted to a surface without any possibility of shifting, and that object will rarely or never be moved (e.g. sensitive laboratory equipment mounted on metal shelves or Formica countertops). But for most applications such as using these underneath speakers, turntables, laptops, etc, I recommend wrapping these bumpers with a layer of plastic wrap if you do not require these bumpers to stick very firmly to the surface, and this will prevent the possibility of plasticizer leaching out, difficulty in lifting the bumpers from the surface, and debris sticking onto the tacky surface that may scratch wooden surfaces.These Sorbothane bumpers are expensive, but they are a lot more effective at reducing vibration than generic stick-on rubber bumper feet. The Isolate-It! company does sell versions of these bumpers with a urethane coating that prevents plasticizer leaching and are also not as sticky. But at the present time, the urethane-coated bumpers are not being sold on Amazon and they are really expensive if you buy them directly from the manufacturer. Wrapping these bumpers in a layer of plastic wrap works just as well :)

These didn't work for me at all. I purchased these feet to "isolate" my tube-driven spring reverb unit, as vibrations send the springs rattling, causing unwanted noise. I experienced no improvement using these feet. The vibration and noise is about the same, or possibly even worse, than just having the unit sitting on the floor.A few cheap pieces of upholstery foam does a better job for a small fraction of the cost.

I bought these to help isolate my sub-woofer from my neighbors in the condo below me. It seems to do a great job isolating the bass and seems to help the sound quality of the lower end too.The downside is that this material is slightly sticky. Upon application to the sub-woofer, they exhibited a "tacky" or slightly sticky behavior with my hardwood floor. My solution was to use the paper covering the top adhesive between the bumpers and the floor. Over time, I could see how these would become substantially stuck to whatever it was sitting on. I have seen other reviews where people complain that this material leached into and stained their wood cabinets too.You probably won't find better sound/vibration isolation for the price, but be prepared to place something underneath these or you may have sticking or staining down the road.