Day 2, with limited sessions with the ZO, but man... I cannot get over how great they make the DBA's sing. Adds that lower end to make it a truly (dare I say almost technically flawless) balanced earphone. Smooth mids and sparkly treble still in full force, along with the slight brightness and clarity that is its native signature (though ever, ever so slightly smoothed/rounded/warmed perhaps?).
Overall the DBA's with the ZO... It's kind of like that girl who you just always connected pretty well with and kind of/sort of like, but physically, there just wasn't that chemical attraction or just never really lusted or crushed for. Then some time passes and you see her again at a Starbucks and end up sitting down to chat for a few, only to realize you can't get up to give her a goodbye hug because you have a huge boner. Definitely brought back them from the dead and firmly in the rotation, truly taking and firmly seating itself in the third throne of my "three kings".
With limited time with the FX700, the ZO seems works quite well the the JVC's. Though I can't see myself hitting more than level 3; maybe 4 if I want incredibly aggressive bass and texture. Level 1, 2 or 3 seems to do the job okay. The "enhancements" to the JVC's are harder to determine, because to my personal listening preferences, depending on insertion/tips/adjustments, were already very, very close to my ideal signature. Even with the greatest cosmetic surgeon (or therapist), it's hard to mess around with your dream girl/wifey. Will have to do some more intensive listening to put a more solid input on it.
Lastly with the SM3, the jury is still out on this one. I'm not sure if the ZO is as great of a match with the Earsonics. Already one of the darkest sounding earphones around, the added texture and low end emphasis makes it sound a bit overly dark, during my initial impressions. The ZO doesn't add too much or take away any thing really in terms of clarity or coloration, at least not on the low level settings; however, once you hit levels 2 and especially level 3 and above, it does add a slight but noticeable brush of warmth to the sound. Obviously, due in large part to the elevated low end emphasis, but that slight warmth also extends through the mids and highs, thus in the case of the SM3's, make it sound too dark upon my first session with it. This is like the artsy/hipster girl, who is really great and interesting and cute in her unique ways; however, if you try to force the issue too much and add too much darkness and complexity, she might go the way of goth or extreme emo, and we all know that is a total boner killer... of course unless that is what you crave; no judgements.
Of course, this is going straight from the FX700 and DBA02, two IEM's with some of airier, sparkly, and brighter signatures (highs) around, directly to the SM3, so I think a part of "head burn in" is in play and affects/biases the initial analysis. Kind of like going full throttle in a tuned up muscle car and then hopping into a Prius and trying to do the same. Okay not exactly, but I think you get the idea.
Like the JVC's, I will also need some more time to dedicate to the SM3's to make a more comprehensive and responsible commentary on its synergy; however, for those that absolutely love the sound of the SM3 and long for even more pronounced and impact of bass and oomph, I will go ahead and say give it an order and a shot. From what I recalled, it definitely makes it more punchy and thunderous, no doubt.
I'm pretty dead tired but just thought I'd chime in on a few thoughts. More commentaries and musings later... ... ...