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

Back in the mid-70s I had a set of double Advents, stacked vertically, on custom stands, tweeters together. Powered by an HK Citation 16 and Soundcraftsman preamp with octave EQ, Thorens TD-160 and an Ortofon MC cart. It combined the Advents neutrality and bass, doubled up for the wall of sound bigness and the dynamics of a whole bunch of power, with the kinda peaky Ortofon making up for the Advents soft upper treble.  That system rocked. With 4X10" woofers it could play the subterranean synth bassline on Stevie Wonder's "I Believe (When I Fall In Love)" from Talking Book like few others. The Eagles "Hotel California", Linda Ronstadt, they all sounded fabulous, as did Keith Jarrett's "Koln Concerts" Al di Meola "Mediterranean Sundance". 

It's a tie between my stacked Advents and a pair of JBL L110s that addressed everything I hated about the bloated and harsh L100. The Advnts were big and neutral, very forgiving with bass forever, but ultimately the 'restrained' high end made me want more, but i did more than a little "One more cut" listening on them. The JBLs were the first computer-aligned Thiele-Small design JBL ever did, along with their first soft dome tweeter. They nailed it. Absolutely accurate, non-fatiguing, great imaging, tight extended bass, and of course, JBL quality cabinetry. Drove them with an extremely underrated Marantz 3250 preamp and 170DC MOSFET 85w/ch stack with the matching tuner that had a real oscilloscope built in. Should have never sold that rig, but a new wife and a move ... and you all know the rest.