That was in 2002, when I was close to finishing the pair of ribbon loudspeakers I built from plans in
AudioXpress magazine. (The book with plans is
here.) I finished off one of them, hooked it to a battery to check if the polarity was correct and to see if they would work. It checked out, so I hooked it up to the cheapo Sony receiver.
Holy crap. With just one of them working, I was pulled in by the smooth mids and highs and exceedingly natural sound.
But I only had one of them together, and it was something like 2:30AM and I was too tired to finish the other one. So I went to bed and left it playing.
After I woke up, I rushed to finish the other speaker. I got it together, checked it out, and hooked it up.
It was nothing short of magic. I had never heard anything so good. They still sound good to me, seven years on. The Quads have better bass extension, but the ribbons I cobbled together for a little over $200 are still superb from the mids up.
Anyhow, the day I finished the ribbons, I went through CD after CD, hearing things I had never heard before.