These brackets do their job but you have to design and attach the other components to work as a whole. 2khz, which to me was a very uncomfortable listening experience. The top of the frame is made from anodized aluminum, giving it a super solid build quality. item was bought as Christmas present for 14 yr. I would have kept them if they were really 8 and 10 inch and fit my stove. I wish I could have had these years ago, they are so comfortable. After wearing them for a day (only around the house, never outside) they have maintained their comfort but I am slightly disappointed with their wear and tear. I knew this going into my purchase from reviews, but still a bit of a let down. They seem super sturdy, so im not concerned about them getting messed up when I have to close consoles on them,. If youre coming from pack-in earbuds or cheaper cans, the first thing youll notice is the detail.