are u suffering from the:

1) deadly clamping force?
2) the earcup is too small that it is not enuf for ur whole ears to fit into it?
3) the space in the earcup is too shallow so ur ears suffer from being pressure?

heres the basic answer:

1) try to "CAREFULLY" bend the two black long metal rod which acts as "connector/ bridge"... a little by a little tho..   it wont break ONLY IF u are not over bend it... 

3) try put some tissue "INSIDE" the pads of the earcups which we called it the "tissue mod"... it enlarge the earcups' space a little so ur ear will not suffer from being pressure...   Dun wry about the earpads will comes out, it is easy to put them back.. 

Cheers mate!!

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Added on March 22, 2012, 11:50 pm

for the number 2 problem, the solution is:

1) DIY ur own earpads with these materials:
    a) a pair of round shape sponges (preferable)/ any pair of sponge
    b) a pair of socks
    c) some cotton for increasing the softness (optional)
2) 1st take out the original earpads, save it tho~ it is the original anyway
3) measures the size of sponge needed and marks them down to cut them into specific size needed for ur ears...
4) cut the socks AS LONG AS POSSIBLE from to make the socks to have 2 OPEN side.. (cut the CLOSED side of the socks)
5) u MUST 1st put the socks onto the earcups of HD661 (to allow u to put in the sponges easier), and put the sponges inside socks (u can try to put a thick layer of cotton to increase the softness of ur DIY earpads) and wrap the sponges with the rest of the socks (if the socks are too long cut them BIT BY BIT... u dun wanna end up the socks are not long enuf to wrap the sponges)..
6) ENJOY UR HARDWORK!!

jus put them to ur ears.. well try to feel them and "cut a smaller mid area of the sponge 1st".. so that u wont over cutting them..

PS: if ur ear is too big/ cant find a big size sponge... easy... cut them into semi circle sponges (means u will need 4 semi circle sponges)... so the middle will be the size of ur DIY earpad~
of cos u wont wanna cover the driver~~   jus STUFF them under the pads will do ~~   as simple as that~

Got my Xonar DX card today. Installed the original drivers, then the unified drivers. Enabling the Dolby features , paired with this headphone is like Magic. You could feel the immediate difference.

Connected my cheap headphones to the onboard audio on my laptop and the sound suddenly became murky. Its like switching from a TN monitor to an IPS monitor. You wouldn't really feel the difference at first, as you're getting used to it, and then when you go back to the old technology , you'd see that there is a huge difference between what you have now and what you had before.

Btw, the total "burn-in" is less than 12 hours. So i think there is a long way to go until 10 hours but at the moment, I have no complaints at all.

Edit: The more i listen with the headphones, the more I am able to distinguish between a cheap non branded one and this unit.  I would say, money well spent

http://osxdaily.com/2009/09/30/itunes-equa...lizer-settings/

Try this for itunes. Awesome. 

Can i ask, which Superlux headphone is the best?

I Would say you Get a amp first

I would prefer DAC, especially if you're using onboard audio.

means that the sound card comes together with your motherboard isn't that good
it is best that u get one of these baby
https://forum.lowyat.net/index.php?showtopic=2265846
https://forum.lowyat.net/index.php?showtopic=1805482
or Fiio E7/E17 if ur  budget allowed
get this first before getting an amp