Definitely agree on the isolation. I also have a roommate, and the isolation is pretty good. It's also not fatiguing, so I can wear them for a long time without my head hurting from the music.
I've been trying awhile to get the K501s, but not much luck.
Between the Q701 and K701/K702 series, which one would you say are closer to the 8400s in terms of sound quality? Also, just out of curiosity, how does the bass quantity in 8400s match up to the Q701 or K70x series?
I would say the KRK KNS-8400 is closer to the Q701. It's not as thin sounding (with a good amp/dac) as the K702 is and has more engaging and more forward mids than the K702. The mids on the K702 were kind of lean to me, unlike the warmer Q701.
They actually have quite a few similarities to the Q701. I didn't do any major A/B comparisons and when I did it was mostly in Skyrim the game. I'd be perfectly happy with the Q701 or the KNS-8400 for gaming.
Specific sounds in Skyrim actually sound fuller, like they had more weight to them. Stuff like the wind, low rumbling sounds in caves and even the horses snorting. I think the KNS-8400 at times feels like it has more detail than the Q701. At least it's easier to spot. Often it sounds a bit clearer too, but both are crystal clear to me. The 8400 makes Skyrim feels almost lifelike.
I actually think if someone was looking for a closed headphone similar to a Q701, the KNS-8400 might do the trick. Sounds crazy I know considering most think it's the K550(!). I've heard people say the SRH-940 sounds like a closed K702 and I'm just not hearing it. To me that's more like a weird mix of the HD-600 and K702. Actually maybe the 598 and K702. Bizzare I know.
I would say the Q701 actually has more mid-bass. The KRK KNS-8400 has more forward/present sub-bass. Some may think i'm full of it, but I noticed this with a lot of music. The KNS-8400 can pick up some sub-bass that my HD-600, 598 and Q701 have trouble with. The DJ100 has better sub-bass though IMO. It's hard to say which is the most accurate when it comes to the sub-bass.
I actually can't think of any other headphones that the 8400 is the more similar to. I don't think it's the K550 or DT-880 at all.
Edited by tdockweiler - 5/13/12 at 9:51pm