With how much I have been using the HE-400 headphones, I wanted to mod the headband due to having such a thin layer of soft material in the band. I bought the senn. 600 headband, some Velcro, and that was it. Thought I would post the pictures.
I will say that with my head size I have to basically have the headphones at max size.
All and all I love these headphones even more now. I can listen to them for hours at a time now.
Edit: when adding the Velcro make sure you stick it to the metal band inside the headband for a nice solid connection.
Edited by KCxSmacker - 11/8/12 at 10:44pm