Finally got around to testing out the fenestrated sheepskins on my HD6xx and....really just not a fan at all, imho. A few other folks have mentioned that "bloomy" sound and I couldn't agree more, that word is a perfect example for what the pads do to the sound to my ears. At first I thought it was just adding bass and made the sound a little more "small bass-heavy club" than the "airy opera house" I get from the stock pads, but the more I listened to songs with detailed low ends everything just got mushy and all the detail was lost. I'm honestly surprised they affected the sound that much (my first after-market pad experience).
I should mention that the build quality is EXCELLENT, and really wanted these to work because I do like how they push the drivers further away from my ears...but maybe that's what causing the bass issue, more area for the sound to bounce around in? I'll probably hold on to them until the HD58x arrives and see how they sound on those, but definitely not my cup of tea on the HD6xx.
tipsymcstaggersI certainly don't know any science behind it, but taller pads do tend to mess with bass. When I had HA-RX700's, I really didn't like how thin the pads were. The fix was to stuff padding behind/under the pads(no removal necessary). Doing so added to the bass, but at the time I liked that, plus they were significantly more comfortable...and if I recall they weren't too bass heavy to begin with. Also I believe partial or full leather tends to add/mess with bass as well, when going from full velour/cloth of some sort. Probably reverberation like you said.
NOMNOMSorry ya'll, just saw these questions, have not had a chance to listen to them on the 58X yet. Honestly haven't even listened to the 58X at all since I got my HE4XX...easily my favorite headphone of the three (and I don't mean that as a slight to the 6XX or 58X at all, just enjoy the 4XX's that much).
tipsymcstaggersI had the HE-4XX and loved the sound and comfort of the pads, but couldn't handle the thin padding at the top (bald & pointy head, sigh). Traded them for 58x with Dekoni Sheepskin , I highly recommend those pads for 58x. Still love the HE-4XX though, I miss them now.
I should mention that the build quality is EXCELLENT, and really wanted these to work because I do like how they push the drivers further away from my ears...but maybe that's what causing the bass issue, more area for the sound to bounce around in? I'll probably hold on to them until the HD58x arrives and see how they sound on those, but definitely not my cup of tea on the HD6xx.