4P Anti Vibration Pads 4'' X 4'' X 7/8" Sound Isolation Ribbed Rubber Mats With EVA Center, Heavy Duty Vibration Isolation Pads for Air Compressos, Conditioner, Treadmill, HVAC Washer Dryer

Used them to stop vibrations from my subwoofer from shaking and resonating my living room. Tried all sorts of other things with varying degrees of success.Spiked feet through carpet to concrete was terrible. Did nothing.Plastic feet on small rubber sticker on a multi layered sound deadening board helped quite a bit but still got the some rattling from the walls, ceiling and fireplace. Elevating the board off the ground with rolled up rags helped even more.Finally replaced the rags with these isolation pads and it’s solved. Now I can pump out a lot more volume without all the shake and rattle. The bass sounds better simply because there is so much less distracting noise and vibration from the room. Probably makes the neighbors happier too.Warning though. Make sure to open the package outside and over the garbage. These pads were pretty roughly cut and you’ll get bits of foam and rubber all over the place. I had to brush off a lot of crumbs. They also stink. Left mine outside for a day before actually using them.

Ignore the negs.. After reading all the reviews I was expecting opening a messy and stinky package but I needed these so I didn't care. However when I opened the package these came out pretty clean and smelled kind of nice, very lightly like new plastic. So either the previous reviewers are just complainers or the seller cleaned up their game. Like I said, I needed these and they are the best ones available. This seller also offers the most size options compared to any others I found. I highly recommend this product. The quality is excellent, the value is fair, the vibration reduction is near 99%, they weight almost nothing, and should last the lifetime of whatever device it's used with. (Also whatever you do, do not buy the cork version of these anti vibration pads. The cork will fail and collapse making them useless)

Worked great. Had some old cork center ones we used for our A/C when we moved in 15 years ago. A/C died so we replaced the system and when they pulled the old ones out, the cork was collapsed. They didn't have any pads when they installed the new system so I ordered these. System rattled the condenser screen for a day until I installed these. Rattle went away. Was told a long time ago pads help the system last longer. Don't know if it's true, but I can't complain about our old system. It was 20 years old when it finally went, and it went due to rust in the evaporator pan, not the system itself. Old compressor and condenser were still going strong. Neighbors replaced their compressor/condenser long ago.

They seem to work well. They have a very strong smell when you first get them but if you air them out for like a week or so you will be good.

I have an outdoor air conditioning unit adjacent to the master bedroom. The unit (condenser) was sitting on concrete. When the unit would active, it would vibrate through concrete floor. Markedly, this defeating sound and vibrations could be heard in our bedroom and would interrupt our sleep. I purchased these vibration pads and Walla the noise reduction fell substantially and you could barely hear the AC unit running. If your outdoor AC unit can be heard throughout your home place 4 of these pads under the condenser and you will notice a significant noise reduction. Will now purchase 4 more for my shop ari compressor. Greatly deserving of 5 stars.

These pads are OK; they are not as hard as similar products sold by other sellers and these pads have a stronger smell than similar items but they are not too bad. The main drawback of these pads is that they are not cut precisely; I returned them for similar product from another seller.

The fan motor on my A/C was a making a pulsating noise that became an issue since it was outside our bedroom. Placing the 4 pads under the ends of unit completely eliminated the apparent ground transmission of the noise. A quality, effective and cost-effective product that made a world of difference.

These work like a charm. Highly recommend them for beneath washers and driers located on 2nd and 3rd floors of homes and townhouses.