What is the most FUN pair of speakers you've ever had and why?

MartinLogan CLS's, which I still have.  Ok, so you have to learn how to NOT move your head from side to side, even a little, but once you get that down, what a blast.

When I was a young pup, my first "floor standing" speakers were a pair of used Wharfedale W70's with big, 12"+ woofers.  I remember that when the cannons went off at the end of the 1812 Overture, walls shaked and people ran for cover!

Speakers have provided much of my fun in 60 years of audio.  The RTR-6 ESL's were unique; several of us modified them with cork facing to emphasize their dipole character.  They produced the best high end I've ever heard.  They mated well with RTR 180's and 280's (both rather average), but when Bud Fried came out with the H kit, their overall character was more appealing.  Could never mate the 6's with that outstanding Fried transmission line woofer, or any other system, for that matter, but always missed that high end clarity.  Also built Fried's last C-3L's and his matching subwoofers (SM-3's), a system that can still "disappear."  Just now finishing Linkwitz's LX-521's, a project that takes some dedication.  Amen to those who mentioned Bob Fulton, a real gentleman and interestingly oblique thinker, as exemplified by his J's.  Still have a number of his fine recordings of amateur groups.   

kenjit again (another forum he started 12-29) states he has superior hearing and cables are all the same. Wrong again.

Speakers which I shouldn’t have sold are Acoustat 2&2s over 30 years ago. I owned them back when I had inferior equipment, cabling, room acoustics and no tweaks. I bet they would give my Legacy Focus a run for the money in many ways using my high end system. Looking to replace the Focus speakers when I can afford to match my system & room (for Von Schweikerts).

50 years ago I purchased my first decent speakers, Sansui SP-100s.  Lots of classic rock went thru them as it was released.

So many great memories, I had the first decent stereo of my peers.  Lost in a divorce, still remembered.  Not the "best" but great fun