There's a dust cover in addition to the fabric speaker cloth? 

Very interesting info RD... especially if FR changes so much. I need to check my BL to see what sort of dust cover it has in the pads. Sorry if this derailed your thread MF, maybe it needs its own thread?

Would any SR-007A or MK2 users care to comment on what sort of dust cover is on the black MK2 pads? I was going to switch to MK2 pads when my BL mk1 pads wore out, but I have at least another 2-3 years left on them. And those pads are freakin' expensive.

No, from memory it does not change the FR.  It just dulls it down significantly, but you'll have to try it and see. 

What must be dust?  I'm talking about listening to a Fostex T20v1 with and without the O2 dust cover and hearing significant differences.  I did'nt expect it to make a difference and I was about to tear open the phones again and check my damping but realized the one thing that changed was adding the dust cover...

Well, I took off the grill cloth on both pads, ( it was a PITA getting them back on - first time changin the pads out on MK1's, really weird system) - it feels even cleaner and more transparent, but I don't know what to chalk up to bias in this case.  My KGSSHV only has one jack so no direct AB is possible. I'd really like to know if this is something that damages the headphones for some reason, as I'm loving the sound right now.


Pictures on the morrow.


Test tracks if anyone cares: Denny Zeitlin - I-thou, Jeanne Lee/Mal Waldron - You Go to My Head, The Meters- Hey Pock a Way