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

Infinity 1.5, with 12” dual Watkins woofers & emit tweeters.  Bought them used in 1980, and they still rock.  Ran them back then with a Hafler DH-500, paired with an Adcom GTP-500 II and a Technics SL-1200 (Stanton 681EEE).  I used to take them to parties and it would shake a room, I even set them up in gyms, and people would be amazed at the sound.  In today’s standards, they’re not that accurate, but when you turn them up with a stable amp, they can still amaze you.

I too had a pair of Altec 19s..ran with S.A.E 2400L 200 watt or so amp...man did I rock back then.

Surprise to see no mention of Zu Audio Omen DW. I think they are quiet fun speaker with great looks and very reasonable price.

I'll second Omen Dirty Weekends.  Easily the most fun speakers I owned.  Big tone, great dynamics. Even though I still own other Zu models there are days I wish I hadn't sold mine.

Keg 104AB’s.  My first foray into the then perceived “high end”. Followed closely by the Quad 63’s with an Entec Subwoofer