Late to the party, but I just welcomed home a pair of new audeze LCD-XC's last night!
My first set of cans were the grado SR80, then the SR225; since then have pretty much been all IEMs with the exception of the stax L500.
I gotta say; I've been missing out. The *huge* sound of these LCD-XC's are fantastic. I feel that having the closed back helps with isolation, and yet you get such an incredibly spacious sound. I demo'ed them against the aeon flow closed headset, and while those were stellar, the LCD-XC's just felt like they were a notch above. Silky, powerful, well extended on both ends; yet just slightly dark and syrupy enough to relax to with a nice drink in hand and the lights down low.
I'm in love with these full size cans, I think my IEMs are going to have to take a back seat for a little while...
powering these off my astell&kern KANN atm, using the single ended output (4V rms iirc). Have a 2.5mm TRRS cable on the way to get the full 7V rms output from the balanced port, but the output impedance changes as well so I'm hoping the sound doesn't darken, or thin out too much. My Kaiser Encores when going from SE on my 120ii (2 ohm OI), to the balanced (1 ohm OI), started getting shouty and borderline sibilant; lost some musicality. Hoping for the opposite effect since reading on the web, strangely the Kann goes *up* in OI from se to balanced (balanced being higher OI?) Maybe due to lacking a dual dac and opamp stage, who knows. Can't wait to hear the results either way.
Feel like upgradeitis/GAS has been staved away for a little bit thanks to these LCD-XC's. Have heard nothing like them; makes classical/orchestral tracks sound so damn good before.