Yes exactly, refer to a_recording's previous mod instructions :D in fact that is my pair of SA3k now!
In fact I even applied dampening materials over the whole surface except for obviously the drivers and the screws (referring to the pic I quoted). No I did not do a bass lens inspired mod. It is essentially like those pad mods where you increase the distance between your ears and the drivers a bit to make it more comfortable; combined with adding mass to the plastic which holds the drivers.
Try find some sound deadeners (they use it in cars) to add mass, they did a significantly better job than bluetac. However use something like felt or rubber next to the drivers (like in the pic I quoted) - this is a mod inspired by anax's HD800 mod. You would want to use rubber/plasticine etc as you aren't trying to add weight but to absorb the sound waves rather than letting it reflect.
Oh and I added a very thin piece of (silk?) to increase comfort and reduce a little more of treble. The sound deadener I used was sticking to my ears before lol, so I ripped the Denon pad's thin cloth apart and applied it.
No I did not and you would not want to remove the piece of (paper?) at the back of the drivers/near the grills. It added a lot a lot of harshness for me.
The overall product is a decent soundstaging, decent FR and awesome positioning/speed headphone that is not too cold/warm. GIANT 70x killer imo xp, never liked it much. Soundstage was decreased as I took a lot of airy treble away; FR is only decent because it has negligible subbass (but good quantity+quality of midbass).
Edited by mrAdrian - 10/2/12 at 7:58pm