"The Tesla is much more expensive - so for the money the Chord is a great value."
Yes I agree. Nice cable for the the money to be sure.
When you have a system that's truly capable of resolving fine detail, The most subtle changes can often make a noticeable difference.
That said, it's always best to refer back to what you had before because sometimes those differences aren't a good thing.
I initially liked the Chord for what it did in the midrange, even though it didn't seem to resolve fine detail quite as well as the Lightspeed.
But it wasn't until I put the Lightspeed back into the system after hearing the Chord for a couple of days, that it became obvious the Lightspeed is a class above.
Now, don't get me into the argument of why the Lightspeed cost's 10x more than the Chord... That's just something I'll never quite understand about the audio electronics industry? (about many industries really...)
As for the U12, well it isn't going anywhere any time soon.
Last week I made a Faraday cage of sorts using Stillpoints ERS fabric to seal off the power components from the digital side.
Didn't take any photo's (should have), but the results were well worth the 20 minutes of my time. The U12 resolves even more subtle detail now, with a nice improvement in the overall tone.