Adding to this older thread. Using a Woo 6SE with Sophia tube upgrade.
I added a 2.5m pair of Clear to the Audeze LCD-3. First impressions of the cable's build are very positive. If anything, the cable is a bit too robust, as you feel the extra weight pulling ever so lightly more than the stock cable.
So you know my biases, I've used Cardas cable before, and am currently using their Golden Reference AC cable. I do hear differences in cables, and in some but not all uses of their AC cable (I also have a paid of Foundation Research AC cables which incorporate a low pass filter, and always hear differences over stock cords). These Clear cables were no different. I think of Cardas as having a generally more relaxed sound, but these Clears did not have the traditional Cardas house sound. They were more open and revealing than expected, but never bright sounding. I was worried they might be too mellow with the Audeze, but they were very neutral sounding and didn't darken or mellow the LCD3's at all.
I think the sound of these over stock is most impressive. More detail is heard, and more space around different instruments is noticed. Listening to Shawn Colvin's "The Facts about Jimmy" and you can more clearly delineate brushed drums. Biggest difference is when Lyle Lovett backs up Shawn. On the stock cables, Lyle's distinctive tone seems a bit buried, but with the Clear cables, you can more clearly hear him layering the vocals. Horns on this track are also more prominent; their detail is cleaner and more delineated.
I missed seeing JJ Cale when he was alive, and now I'm left to listen to his great sounding CDs. On his album Roll On, "Cherry Street" is one of my favorite tracks. I've listened to it time and time again, with its great guitar pairings. For the first time, I was able to hear detail that had always been obscured: what I thought was the growl of a guitar is now revealed to be JJ lightly humming along. Cool!
I'm in a mellow classic mood tonight, so after JJ it was time to fire up Bob Dylan's superb sounding Oxford Town from his second album. Listen to this and the classic "blowing in the wind" track, alongside "House of the Rising Sun" from his first album, and be shocked at the fidelity of these early sixties recordings. The Clear brought more detail to the breathiness of the harmonica, and his guitar is that much more present.
On Sheryl Crow's album of the same name, two tracks show off the Clear. "Home" has a nice tone and decay of the guitar, and the bass is nice and fat. On the stock cables, this track can sound a bit collapsed and flat. The Clear brings out the tone of the guitars and the bloom of the organ. "Hard to Make A Stand" has a pronounced fuzz on the guitar and the fat sounding bass has nice detail that the stock cables can lose, but the Clear preserves.
So, I think these cables are quite the upgrade. Are they worth the significant price? I paid $475 on Audiogon, so it wasn't as painful as a new pair. I haven't heard other upgraded cables either. But I won't feel the need to try out anything else, given how good these sound.