Which components knocked you out on first listen?

Elite dv47ai...first time I heard multichannel sacd. The rest of the system is 49txi, jmlab electra, parasound.

My 1st official KO came in December 2001 when Gayle Martin Sanders of Martin-Logan was touring showing off his Statement E2 electrostatics.
These speakers were driven by all-Krell electronics & cabling was MIT everywhere. I don't remember the Krell model #s except that the FPB-600C monos were driving the Statement E2s.
I had auditioned a # of M-L speakers for my home but just could not get to like them. Neither am I a Krell fan for various reasons.
However, what this Krell-Statement system did was pure sonic nirvana! The immediacy, the transparency, the purity of timbre, the feeling that I was sitting at the venue of the music event, the sheer power, the nimbleness of the amp-speaker combination to reveal all the nuances was just over-whelming & awe-inspiring. On the effects side - the bass was truely moving (pun intended) as all items not securely bolted to the wall or floor rattled & moved when Gayle Sanders played a certain church organ recording & those bass notes went 20Hz & below!
I've been to a few dealerships & been impressed but this experience was a total KO!

when i first heard magnapan speakers back in the early 70's.the clearest most open sound i have ever heard.it took over 25 yrs.,but i finally got a pair of 1.6's.

About 7 years ago when I purchased my Vandersteen 2C's my wife went with me for the final look/buy. She asked to see/hear something significantly better.

The owner took us into his high end room and let us listen to Apogee Grands powered by 4 giant (not sure what they were) tube amps.

I have lusted after the Apogees ever since.

R - Where was that? - an Apogee Scintilla owner.