I have been experimenting with sorbothane and clamps on the Stax SR003 headband, and as with the other Stax phones I am quite impressed with the results. You get a wider sound field, cleaner overal sound and especially cleaner bass. I applied two thin strips of 1/4 in 70 duro sorb on the metal bands. This alone helps Adding the clamps helps even more. At the same time you can see where sorb is added to the earcups. You just pop the earcups out of their plastic holder and stick on some sorb and then pop them back. I am using either 1 or 2 mm thick 70 duro sorb. The 2 mm seems to give better sound but it makes the earcups stick out a wee bit from the holder. However they still seem to be quite solidly in place.