just put in GZ34 in WA22, since i'm listening the last few days before its gone.
sounds really good, theres some coolness to the sound of the GZ34, a sort of smooth clear dynamic kinda sound.
but yeah back to the sound, i like it, just wish it had more bass. the soundstage is still huge! sounds much better than the black base GZ34 from memory, the black base has grain/slight harshness in the highs that the metal base doesn't have.
putting black base in WA22 to compare right now, maybe i won't notice a difference, maybe i will.
EDIT: yeah the black base seems less smooth, its a little grainier, small but noticeable. narrower soundstage, less 3d sounding, bass is slightly different, more of it, but slightly bloated and not as tight. i think its more aggressive but the dynamics aren't as great, more compressed sounding?
When I need more bass on the WA22 I usually switch headphones. My favorite headphones for bass are the Denon D-7000. Less bass but a bit more clarity and dynamics is my Beyer DT990 600 ohms.