Just a couple opinions...I own the X and XC and greatly prefer the X side-by-side. However, the XC sound good and they're closed. In an office environment, if there are other people around then you need the closed HP. With more time and maybe a good amp (the 3's impedance is about 110 ohms, while the XC impedance is 20 ohms), I think you'll see more of a difference between those cans. So just flex the wallet and pick up the 3 for home use, and the XC for the office. You'll make a lot of new friends
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Cheers -
RCBinTN
I, too, lean towards X a lot more than XC. With the stock cables, my XC resembles X in sound signature pretty much. The closed-back XC also sounds quite open and natural but still lacked the openness prominent on X. And more importantly, X's bass is PUNCHY - whose wilderness & extendedness I've been really obsessed over; XC's bass, while being as lively as X's, sounds more fluid, resonant and tender when putting the two together. This was way different from my initial expectation, since I expected the closed-back cans to be more pronounced in bass than its open-back sibling. Yep, quite the reverse…
To me, both units exhibit near perfect balance of bass, midrange, and treble. Even though I have long been a classical/jazz fan and was not a bass head, the Audeze planars instantly conquered me with their marvelous bass and turned me into one! I've never been so engaged in electronica and dubsteps, WOW.
Some head-fi'er commented that LCD-X pretends to be neutral while in fact it's not neutral at all, which I agree to a certain extent; and obvious to me, XC does have some coloration in midrange, which I stand neutral with. They are both clean , engaging, fun and far from clinical. If it's not for how aesthetic that XC looks compared to X, and if I have to choose only one out of the two with my view based on sound only, LCD-X is the no-brainer.
On the good side, XC's look is a killer! Comparably, X's appearance is a bit too "industrial" for my taste. And back to sonic performance, XC is only overshadowed by X when I play tracks of some certain genres. NEVER have I imagined a closed-back to be so spacious, natural and soulful.The fine-tuned resonance adds a lot to the XC's musicality. The isolation is cool, if not great, since it still has noticeable leakage of sound in and out. Sadly I can't tell what they exactly are, as I have returned my LCD-X a week ago (see below).
I bought a Black Dragon V2 Premium single-ended OCC upgrade cable for my LCD's from moon-audio. With the cable my XC then sounded noticeably different. I also tried applying it to my X too, however I don't like the changes and preferred the stock cable. To me the cable's refinement, tightness and control are great additions to my XC, but poison to my X. So with the upgrade cable my XC gains additional refinement and no longer keep reminding me of how my X sounds. Before this the two headphones were too similar and the XC's lack of openness (when you compare XC to X of course) was a big issue.
For a moment I decided to keep both of them. However, my LCD-X had not always been performing perfectly. Note that I did not buy both together, neither did I plan to own a closed-back planar at the beginning.
Days before I purchased my XC, I found my X to have a flawed stereo balance after a week of use. Strangely, after my XC arrived the X seemed to have recovered from the unbalance. And after another week, the worst thing happened, when connected to any of my digital sources, my X began produced a sound which was much duller/fainter than ever, like a time bomb finally denoted. And again it lost its stereo balance. Sure, for a while my X had been an all-round champion for a while. Maybe it will recover, maybe it will not - I have lost my patience. Then I returned it to the dealer and I'm still waiting for a refund.
Though my XC is almost an equivalent of my X (be it price-wise or sound-wise) and is now my favorite, there's still something XC can't offer as much as X does. The differences are as subtle as vast, and I don't feel convinced enough to buy another X (yet). Even so, I still miss the LCD-X a lot…
Besides, if had to buy another pair of headphones, I'd prefer something that tastes vastly different from the Audeze's. I'm now interested in the Hifiman HE-400i. I doubt if there's anyone who has tried it and compared it with the Xs side by side, but guys I would appreciate it very much if you want to share your thoughts and experience. Thanks!