Mains are a set of 5 Sony
SS-M3s.* Started out with a stereo pair way back in about 1990. I was impressed by their refreshingly neutral sound. They didn't jump out and dazzle me - they just seemed to get everything right. I liked the way they were put together as well: Peerless drivers, sealed 1-inch-thick MDF trapezoidal enclosures, 4-pole (24dB) Linkwitz-Riley crossovers. These were not your typical Sony mass-market speakers.
At about $500 apiece, they would've been out of my price range, but I got lucky - the music store I worked at was liquidating its audio-video department, so with my employee discount I was able to score the pair for about half price. Over the next 10 or 15 years, as my interest in multichannel grew, I started collecting them on Ebay until I had 5 of 'em.
A few years ago, I got the urge to tinker. So I spent a lot of time learning how to take accurate measurements. Then I spent a lot more time measuring the hell out of them. As good as they were, I saw a few areas that could be improved, especially with current technology. So I pulled out the internal passive crossovers, and went to a full-active setup using a pair of miniDSP nanoAVR-HDAs for driver & room correction, and a pair of Outlaw Audio 7075 power amps connected directly to the individual drivers. The sound is now more transparent and organic than ever. They don't sound much like speakers anymore - the music seems to just materialize in the room. It's immensely satisfying. I'm thinking I must've done something right, because I haven't felt that urge to mess with them in a long time!
Below 70 Hz, I'm using a pair of Kenwood 12" dual-voice-coil car stereo woofers, with an individual 110W RMS-rated amp channel connected to each voice coil (4 total). Not a lot of power by today's standards, but I can't get too crazy since I live in an apartment. The woofs are installed in 2 original fake-wood-grain Large Advent boxes, with the original crossovers & tweeters still in place but disconnected. I've had the Advents since I was a teenager (I'm 61 now). They look like hell - they were blasting away in my van when I totaled it back in 1980, so there are big chunks out of the particle board in places - but they're still sealed, and with the Kenwood drivers they're room-tuned nice and smooth right down to 16 Hz, so I don't give a damn how they look. One of the few upsides to being terminally single is that I can have any kind of jank-ass rat-rod speakers I want in the living room. Besides, I'm kinda sentimental about these old Advents - we've been through a lot together.
*These aren't mine - just an online pic I found. My Sonys ain't as pretty as these either, but they sound better.