Yes, I had a listening session of over two hours (I really wanted to hear all the aspects of these speakers, they are very beautiful by the way), they used both sources, digital and analog.
Yes I totally support Kedar's statements.
I had the opportunity two months ago to go to Varna-Bulgaria to our friend Yanislav to listen his extraordinary dual FLH(Front Loaded Horn) Altec 817 speakers.
It was all a beautiful dream.
Listened last year here in Helsinki Trio G3(long listening...
A trick question ?
I know that it is not possible to I correctly evaluate the sound from a clip on YouTube, but I know everything you see there, I know those electronics well, they are high quality. As for the 817's, I love them, they will probably be my next speakers.