Originally Posted by spittis
Interesting, I compared the two (DT 990 Premium 250 ohm) quite thoroughly and thought the HE-400 did better in 9.5/10 cases.
Quoted from way back, I'm clearly too slow to keep up with the thread. I had the DT990 600 Ohm, I'm sure they are not that different. But the biggest factors leading me to sell the HE-400 were the following:
I felt the soundstage was slightly larger (something I enjoyed)
I enjoyed the treble more, it was more "forgiving" than the HE-400 that simply made certain electro tracks of mine too bright.
And most importantly, comfort! I could wear the DT990 for hours and forget they were on my head, while the HE-400 was a bit too heavy for me, the velour pads weren't as comfortable as the DT990s and my ears would hit the pads and create some soreness after 15-20 minutes causing me to re-adjust the headphone ever so often.
All this may change if I ever get my hands on the DT990 again, I'll quickly realize everything that the HE-400 does better. Only time will tell.