3 Inch Thick

These will cut down on mid to mid-high reflections on parallel surfaces. I re-ordered after about a year and the new ones were different white. Not sure if the old ones faded to a more cream color or were just different from the start but beware when mixing/matching.

I use this on my piano room ceiling. It does not have any adhesion and i have to use a a lot of cement glue from home depot. Luckily the glue does not cost muchThe sound on the piano is much better compared before.

Comes with double sided tape, basically everything you need to install out of the box. The main reason I went with these was because it came in white to blend in with ceiling color and hopefully it helps with reverb/resonations. I don't believe I have enough to noticed a considerable difference, so I may try a few more pieces. Overall, if it does what it claims, then it is a good value.

Works as expected for treating ceiling in my listening room. I have them over each speaker and over the actual listening seats. Have even used them for first reflection points as well. Actually white in color not ivory as in some of the reviews for other items that are similar and that alone makes it look less intrusive. Easily hung with 9 small pieces of double sided tape along edges and one in center. Just enough to be moveable if not as straight as you would like or to relocate. If I need additional I will come back for sure.

Look great, nice and thick. I just wish they had a board behind them or an adhesive that I could stick to a wall.

I wish I had other choices for WHITE acoustic tiles on Amazon because these were crazy expensive to complete ONLY 1/4 of the project I had in mind. DARKER COLORS are cheaper and plentiful from other vendors but not White... I couldn't tell you if they were effective because it only covered 1/4 of the space for too much $.

I have a bunch of panels that I got for about half as much as these, (different brand) but I specifically needed white panels in one area so I got these and the difference is noticable. These are thicker and denser and seem to absorb sound better. Now I'm going to replace my old ones with these.

I live by a train, as in your can see it when it rolls by. Orders to help for sleeping. Works pretty well.