They were not perceived as issues until I tried the LCD-3s, side by side with the LCD-2s. That was at King Audio, a Headphone store in Hong Kong last weekend. The source was a highend Marantz SACD player and amp was a Vioelectric V200. That V200 was a very sweet sounding piece. Very tube like in all the best ways.
First thing I noticed, was that the LCD-3 were quite a bit more comfortable. The thicker, plusher leather earpads were very comfy and the headband fit my head better.
Listening to the LCD-2s first, I could tell the sonic signature was similar to my own. Then on first listen to the LCD-3s, there was just less grain, more soundstage, clarity, high frequency detail, and just plain balanced and more natural sounds coming from the LCD-3s. With only 30 seconds head time, I wanted the LCD-3s
After buying a pair of LCD-3s from ALO Audio when I returned home, I can't get the new headphones off my head. Something I could not say about my LCD-2s. Could only listen to those for a few hours before listener fatigue set in.
How substantial are the differences? I'd say evolutionary, not revolutionary. They still sound like Audeze headphones, but with more refinement in areas I value. The LCD-3 is a better fit to my audio priorities, where the LCD-2s were very good, but did not rise up to end game potential for me.
I can't get the new headphones off my head: and it start to be a troube with my ears. 1 month now I'm listening 3-4 hours EVERY EVENING!!! And my ears start to say STOP! So I decide to stop for 1 week... be carrefull with that. Last month I stopped smoking, this month I stop LCD 3, hard time on me...
I think if you smoke more, the blood gets thicker and protects your ears better! This works for me, and should it get too thick, I simply thin it out by drinking beer. This further adds to the great sq!