Slightly off topic, but this is what I am doing right now and wanted to share :
I am comparing X2 to DT150 right now. Both connected to: iPTouch Line out -> RCA -> DV336SE tube amp (
Psvane CV181 T2 front,
Zaerix 6AS7G back tube).
X2 is a clear sounding HP. The source you feed is the question here. X2 is also warmer and has a full bottom end. Has very huge soundstage (hugest I have ever heard - in every direction).
X2 puts distance between different instruments where DT150 puts less space. So overall perceived clarity seems slightly more with DT 150 but its not the case... With X2 I can hear every detail but in a big soundstage with distance to each of them. So my brain need to focus more if I have to pick them up individually. Layering is unbelievable on X2's.
On my list I have classicals, rock, chillout, etc... While listening Angus and Julia Stone "Hold On" with X2 I have tried to lower my "head" and secure it from the "sound" hitting to me at the beginning of the song (between 20-25 seconds part). The soundstage and especially ss depth is amazeballs. Like the real thing... Right now listening to "Bring me to Life" from Evanescence and those drum attacks arrrggh, I feel the membrane of the drum vibrates after each kick with X2... I can nearly imagine it if I close my eyes...
On the other hand, bass is very good pronounced and very clean on DT150. It's more linear bass till the subbass region on DT150 then it gains some more dB. Because of this sspecially subbass is a star on DT150 though I would prefer more linear bass. X2 bass region is not linear as well...
When you switch to DT150 from X2 you feel the reverb of the DT150 because its a closed HP design where with X2 sound feels more airier without the reverb. Both of them very enjoyable... I am giving the edge to X2 for the FUN factor and huge soundstage. Both are excellent phones though and for different usages...
(... and YES, I am comparing apples to oranges right now
)