Thanks! Its a shame wanted to try them.
Get a second hand one.
The Dekoni pads are definitely better than the stock vented pads, and better than the ZMF Ori perforated lambskin. It’s a shame they seem to be too large for the headphones though, and slide around a lot. I’m done trying to polish this turd of a headphone. Good cups, good drivers, everything else sucked.
I found this thread. I think I’ll try to find them again (somewhere in storage) and attempt to get some replacement pads.
Considering the cups and drivers are pretty good quality (I think), is there any reason to think something may be achieved by fiddling with the baffle/damping in the cups?
After a year of use and reading others opinions these seem to be extremely over priced $150 headphines. Looking into picking up a new set of cans to replace these, any suggestions? Im looking at the Sundaras and AKG K712.
HD660, of course. It, Erupt and Mobius are my 3 favs at their prices and below still. But Sundara is fine, if you like thin/light sound. AKG’s sound too distant, and circular cups/pads suck for comfort.
You’re not wrong. The k712 I enjoyed back in the day. I don’t think they quite hold up today especially for the price in the USA. In fact in the US I’d say they are overpriced as well. I’d go Sundara all the way.
Sennheiser isn’t exactly known for their soundstage. Do you have experience gaming in them?
Of course. That’s how I know how they sound. 
HD660 is NOT like HD600(terrible) or HD650, soundstage/space-wise, which is a major part of why they’re way better than 600/650 for FPS. Also better clarity/detail presence.
Sennheiser not known for the soundstage? Heard of a little guy named HD800…? 
Or HD700, which I believe HD660 uses the drivers of.