I posted the paragraphs below a couple of weeks ago on another thread about the new Tesla cables, but the whole thread went away for some reason. I'll post again if it's OK with the moderator:
I have gone through two upgrades to my two pairs of (formerly) Designers Reference interconnects: first from X to X2, and now to Tesla Apex.
First of all, its great to be able to upgrade at the factory, and not have to worry about selling the old and buying new. Ive had the cables back in my system for close to two weeks, and Im very pleased.
Synergistic interconnects have always had a warm sound that I appreciate. The Tesla cables retain the characteristic warmth, but add a level of detail that is ear-opening. Wait until you hear cymbals with these: the strike of the drumstick or brush, the actual tone of the cymbal, and the decay. Great stuff! And all of this is done without adding any brightness or hyper-detailed sound that some cables especially silver exhibit.
I have always thought that Synergistic interconnects had the best bass of any that Ive heard, but the Teslas have a tighter bass with more impact than Designers Reference. And imaging seems to be improved as well.
Yes, its only been two weeks, but I havent yet found anything about these cables that I dont like. They are clearly better than the already excellent Designers Reference, which I chose after listening to a number of other top-of-the-line brands. I have no connection to Synergistic Research just a satisfied customer!