Hey Guys,
Received my ZX-2 on Tuesday morning, have been running it fairly steady since then (overnights etc probably @ 30+ hours) and wanted to give some initial impressions.
The burn in process is definitely at work with the unit, I've been experiencing a lot of the same changes posted here. First hour or two the unit seemed "flatter and thinner" than I expected. It seemed similar to my experience with the ZX1 at the Sony store.
After that it went through a pretty manic period, sounding considerably warm, with fuzzy base that was overwhelming the mids. Trebble seemed veiled as well. Decided to let it run it's course overnight and come back to it the next day.
What a difference a day makes, the bass started to tighten up as well as go a lot lower. It began to separate itself from the mids and continues to become more and more defined. (Really loving the privilege of hearing this thing come together).
Over the course of the day the treble had re-appeared, everything is becoming a lot more balanced at this point. Left it overnight again to work it's magic.
Came back to it this morning, wow, this thing is starting to really open up, details are becoming more and more stunning, also the soundstage is opening up, I'm feeling a lot more space between instruments than I was previously.
I can't believe how good this thing sounds already. I'm really looking forward to the next set of changes.
All listening sessions have been done with Westone W60's using an aftermarket cable (locally built). After the sony breaks in completely I want to have the cable terminal re-done with a TRRS jack to take this thing to the next level.
One of the biggest surprises with this unit has been how well it implements 16/44 material. I knew it would excel at the hi res material but I keep being blown away by how well it handles CD quality music as well. Especially with the DSEE HX (which I was experimenting with this morning). I need some more time to evaluate this as I just started using it, but my initial response was positive. I also want to experiment with the battery time relating to using it. Sony states up to 66% less battery when using it.
@spatzi it seems like your battery might be defective, I also have a 501 serial and I haven't been having any run time issues, you might want to make sure you're not using the DSEE HX or any other equalization, I think it really affects battery life (speculation at this point).
I'm not impressed with the Clear Audio + using IEM, I'd rather listen to music without it, it seemed to V curve the sound and muddy things up. I did enjoy using the Clear Audio + when hooking the unit up as a line out on a modest stereo (friends house/work etc).
Also make sure all your album art is tagged properly, I'm fanatical about that and found out quickly that I had to re-tag a bunch of albums (itunes doesn't tag each file by default). I've been using XACT for mac to do this with about 95% success.
Loving the unit so far, this completely destroys my Ipod Classic + Fiio E12A combo I was using before. Also if people think the ZX2 is large try carrying the ipod brick around for a week. In my opinion the ZX2 is more than a reasonable size.
More impressions to come!