Heavier duty then a lot of other ones I looked at. I wear size 13 shoes, ordered the same size for the slippers, and the length and fit was just right. Not only was every section (instrument) as clear as day, it was distinctive AND it had a direction as though I was sitting in the room with people around me. Serves the purpose for which I needed it. The sound quality was good. I first bought into Divoom as a brand with the Pixoo and Timebox Evo (both brilliant devices in their own right), but they have really done themselves proud with this speaker. Even as early as the fourth decade of the last century did people look to the phone book for exploitative commercial reasons. Ive been pretty stuck on JBL and its sound quality since I got my first portable speaker 10 years ago, but the quality for music and calls for these PALES in comparison to anything JBL brand that I had before. I have not moved the rack since I put it together and I cannot speak to how it does when being moved but I am sure that if you take your items off the rack, move it to its new location and then add the items back, everything will be fine! Ive settled on Audio Technica which is about the best correct sound.