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

In the early 70's I bought the 901's everyone said were so amazing.
A few months later a friend took me to a new place called Speaker Lab.
I bought the kit version of their top model -a Klipsch corner horn clone.
All in under $500 assuming many hours of free labor cutting up the 2 sheets each of particle board that went into the interior folded horn.
I kept those bad boys for many moves and eventually they went to guy
whose phone number had the last for digits that spelled ROCK!! 

My current speaker, Cube audio nenuphar, coupled with a SET tube amplifier! 
I have had many speakers with various amps, including focal Aria 936, Wilson sabrinas, german physiks unlimited, kef reference 5s.
The ease of flow, the dynamics, the emotional connection, the realism are unparalleled. Truly addictive.
A good SET tube amp pairing is a must to get the best out of these efficient, crossover-less speakers (or a low power class A Solid state).
Highly recommend. I believe i have landed my final speaker with this one ))

Magnepan 1.6s paired with an old 15” Sumo subwoofer and Sumo crossover.  Never could dial in an optimal mating between the panels and that huge sub, but this combination was otherwise as fun as all get out!

Ilumnia Magister: the best speaker ever. A driver,with a cone on a magnetic field: pure, natural, holographic ,and detailful sound ! Omni-radial. Look at: Ilumnia.be. Never heared a better one.

For me it  would be the Klipsch KPT-904. Great clean bass and articulate highs and no one wants to leave when you fire them up. 2" horn top with a two 15" woofer bass bin and 105 db efficient and even small amps would deliver more sound than you could handle and the drivers did not have to work to do it. Cello to heavy metal they did it all superbly.