These are my initial impressions. Simple as that. After I get a group of the ones I liked the most after a couple songs, then they will be analysed deeper. I have hundreds of hours with my 7308 already, so I have been comparing everything it it.
This is how I do things. I can usually immediately hear the differences between tube types/brands. Some more than others. I does not take me hours to decide on any piece of audio gear ever. 1-2 of my favorite songs is all it usually takes. I built my own tube amps in my main system, and have been through enough tubes in that. When you have a setup that is very resolving it does not take hours and hours and 20 of your favorite albums to decide.
Now all that being said, I have different tubes for different styles of music too.
Metal: A nice crunchy very forward tube, like the Russian 6N1P or the 6N23
Normal Rock: A very detailed slightly warm tube. I like the Amperex 7308 here.
Jazz: A detailed, neutral, wide, and deep soundstage tube. A NOS Genelex Gold Lion fit this bill.
This is how I usually use my Aune. Now that these ECC85's have come to light, I get to redo all of my findings. Fine with me, means i get to listen to more music.
Also, with a pile of 300 or so tubes here to try, where would I get the time?
I am a busy bee already with these new tubes.....
and I just found these.....Harmon Kardon labelled ECC85's by Amperex, but made in England? Know what that means???