x2 on the 662F. I just did a super easy quick mod to these together with new pads ----what a sound. Insanely great.
The Creative Soundblaster World Of Warcraft pads just arrived tonight. Super easy to install and a perfect fit. The comfort is unreal. Same inner holes and height as the stock pads,.
Here's a few pics of this mod. I am used to modding orthos so this was a bit different than I am used to dealing with, in addition the baffle vents screwed up my usual rates of special acoustic filler so I had to drop my rates down.
It's very important to use the inner opening stock foam and fabric discs that came with the stock pads. It's what the factory has tuned these things with( obviously ).
Simply excellent sound, not that they don't sound excellent stock, this just is the icing on the cake, that little extra that just does it..
Creatology thin adhesive foam around the center there, Dynamat around the outsides of that area and that is also topped off with the Creatology foam. ( not all steps are shown here thought I had taken pics. )
On the baffle rears there are two sections between the white fabric covered tuning ports. In these two areas I added a curved piece of Dynamat that same width also topped with Creatology foam.
EDIT FEB23 '13 :So not shown there is the red foam that covers all the dynamat in the cup rears, I also bumped up the acoustic filler a notch, and stuck a Micheals thin adhesive craft felt on the raised circular post top directly behind the driver, cutting a small line to allow the wiring through, also made sure to have the felt go around the rubber bumpers and not ruin those. Most excellent. Off to test them to see if this knocked off the bit of peaks i was getting and give a better more natural increased staging ( properties of the special acoustic filler )
Most importantly the rates of Acoustic filler i use had to be tweaked a bit due to these ports in the baffle. If they were an open can it would have been fine but since they're closed up I had to hit the sweet spot between too much ( losing details and staging ) and too little ( a slight peak on the highs not bad though ) Fairly easy to find that zone but that's because I am used to the particular stuff's properties.
What I noticed about opening these besides how easy it is to open them, is that the wires are secured at a pint just before the solder joints, so if you are careful you won't do any damage to the wires with repeated openings.
the pads, my gawd the pads are so comfortable and soft.
they look like they are stretching too much around the baffle but not so, a perfect fit. It's obviously easiest if you fold back that pad rears then roll em back over the lip.
But I think they will not do that. We still have to do some mods to acquire better sound. 
We also bought the wrong inductors because we didn't do the microfaraday to picofaraday conversion correctly, so we are actually short 4 inductors. 
