Found my way out of my lurking cave (hopefully)  ...

Really wanted to remove the metal mesh thats behind the magnet and took some measurements in the process.

Kinda fucked up my coupler (like just a few hours ago) and Im pretty tired so these measurements aren't accurate at all.

http://i.imgur.com/w8TRnhi.png

This is stock without the senn liner. I kept the anax foam trapezoid thing in place since I didnt really want to remove it just to put it back in 10 mins later.
I always get funky dips (or much worse looking peaks) between 6 and 10 khz depending on the materials I use.

http://i.imgur.com/FsM1hZv.png

This is without the metal ring driver baffle (didnt bother to put the screws back in for the measurement but I dont think it should matter too much).
Pushed the cup against the coupler, mightve used too much force.
Id say it does what youd expect. No voodoo magic. Its in there for a reason. The last time I listened to my HD 800 without it was like a year ago so I cant comment on the sound but afaik I didnt like it.


Might redo these measurements (doubt Ill unscrew the ring again tho) when I fix my coupler. Ran out of foam so itll take some time.