When was the first time that you heard great sounding speakers?

For me it was 1977 at Purchase Radio in Buffalo NY. My brother and I were putting together a system that we would share at our parents house. The song was Aja by Steely Dan on a pair of Altec 19's that blew my mind at the time, I'll never forget it. They were a little out of our price range at the time. The system ended up being a Sherwood receiver, KLH speakers, a Technics SL-1950 and a cassette deck that I can't remember the make. Great memory! 
I believe it was in 1979 when I visited a local hifi-shop with my brother and Dad, and they played the newly released Pink Floyd album 'The Wall' with "Another Brick In The Wall" (Part 2) on what was probably a pair of Yamaha FX-3 speakers (w/15" woofer), also newly released at that time. I was quite an exhilarating and physical experience that reverberated the whole room and our bodies. 
DCM Time Windows and I have no idea what year. Too long ago. I have to give a nod to @twoleftears for mentioning the Stereo Shoppe in Ann Arbor. Used to go there once in a while. Brings back memories of the hash bash and Shakey Jake on the Diag!
1980, Went to the Speaker Shop in Buffalo N.Y. to audition the Kef 103.2s and went I entered there were the 105.2s playing, UGH! I had limited space which I knew but them 105.2s were Great. Got the 103.2s.Years later a new house and  got the 105.2s. Still have both.
First speakers that really grabbed me were a pair of Vandersteen Quattro's hooked up to an all BAT system at Audio Connection over 10 years ago.