If I understand it, you are placing sorb on the headband. I wouldn't have thought much vibration could get there on these phones. There is a lot in the Stax 007 because the metal strips which comprise the headband are directly connected to the earcups. However, Sennheiser puts its damping material in the headband of the HD800, but I believe it's headband is also tightly connected to the earcups. At any rate, what you report would indicate that the SR5's can use more sorbothane damping material. I finally figured out how to open these phones up with the intention of doing exactly that. 1. The earpads simply lift and pull off although mine were also attached in two spots by 2 1/2x1/2 inch pieces of double-sided tape. If yours have these, locate their locations and pull the tape off slowly. 2. Unscrew three small screws that hold the earcup together. Mine were in quite good condition considering their age, there was no dirt and the dust covers over the driver were intact. In fact they looked almost new. I added 8 strips of 1/8 inch 30 duro sorb as shown in the picture. Each piece was about 3/8 inches deep and 3/4 inches long. I added 3 more small 5/8 x 5/8 inch pieces under the earpad locations and put the earcups back together. While you really want to let the sorb adhesive cure over night before doing serious listening. I was starting to hear some improved dynamics and tonal detail. I found myself swaying and tapping my toes to the music, always a good sign.