I need help describing the sound of a SET to a friend in English.

It says Sentimental Every Time. He'll understand.

Real/realistic, if done properly.

DeKay

I guess I was somewhere in the range...

"the music coming out of a SET is liquid yet it preserves dynamics, definition and darkness ( I do not know if this is how you describe the empty space between the notes) but the single most thing I like is that you can close your eyes and have the same experience as one would in a symphony hall....

Don't expect the power and dare to say heaviness of other and more powerful amplifiers, but because that lack of power I feel that they reproduce music like anything else, delicate in the sense that they preserve and reproduce music true to life."...

Organic

"organic" is really good.

Also, if your friend is so inclined...

Listening to Kepa Junkera Urraza recordings through a decent SET based system is mind blowing.

DeKay