I was just listening to a set of Tesla E88CC Gold Pins on the Lyr/Bifrost-Uber with HD800's and ATH-AD2000's. These tubes were discussed a few times in the prior thread, and I picked up 2 sets awhile ago, but this is the first time I've had a chance to give them a listen.
Just to get my ears ready, I first listened with Amperex USN-CEP's, which are among my favorite tubes. Then I rolled in the Tesla's and wow, the Tesla's are very close in performance to the Amperex. The Tesla's have a tiny bit more warmth (which ain't necessarily a bad thing) but are detailed across the spectrum with a similar soundstage (medium wide) and presentation. They sounded excellent with both headphones (listening to classical). 9/10.
These have to be one of the best bargains out there at around $50 per pair.
Where did you buy them? Thanks.