I gotta say that I'm really liking my K340 for this reason. The spaciousness is really nice to have and I really like how they have a laid back kind of sound though still with nice enough level of detail. The only problem is that my earpads are flat like pancakes. Slightly painful on my ears if I move around too much. In regards to sound, the lowest bass is lacking (there's still a bit of punch though), but it's hard to notice once I get into music as it seems to roll off slowly.
Not sure if the bass heavy K340 would fix this by having bass that extends lower, or just "louder" bass and probably mids.
I have a K340 with the green dynamic driver housing. As far as I know, it is stock though I have replaced the elastics. Perhaps the elastics I chose are too tight so the headband isn't adjusting properly and so the grill rests on my ears.
I'm powering the AKG K340 with my DACport. I hope it has enough power. I have the volume knob at about 50%. I tried a few of my DAC/amps and the DACport or Apex Glacier seemed to fit the best. The Glacier seems to have some sort of grounding issue though with a slightly crisper and slightly painful sound.
Edited by namaiki - 7/3/13 at 8:27am