I truly didn't expect this to go 'viral', haha.. I had these for sale and just recorded this quickly for the guy who bought them.
These are a very well done DIY build, circa early 2000s, with NHT 1259 woofer, Audax 'Aerogel' HM140z4 midrange, and ScanSpeak D2905/9300 tweeter with internal crossover for the tweeter and midrange. Based on legit plans circulating online audio forums at the time, designed by someone who knew what they were doing. Cabinets are extremely heavy duty with 1.5" baltic birch sides, 2" MDF fronts plus 1/4" oak veneer, lots of internal cross bracing, completely lined with a self-leveling concrete product, and stuffed with proper acoustic batt.
I've been thinking about starting an audio YouTube channel - maybe this will be the nudge I need.