Not that many in the last 20 years or so. In order from early 90s to date.
Epos ES14.
Sonus Faber Elector
Sonus Faber Electa Amator
Martin Logan CLS-IIIz, REL subwoofers pair, can't remember the name.
Red Rose M3 ribbon hybrid, still have these in storage.
Studiospares/Seiwin SN4s active speakers in current use.
The Epos were outstanding for the price but very square and ugly hence the Fabers. The Electa Amator were wonderful and I wish I hadn't sold them. The Logans I had for a short period when I had a dedicated room, fantastic on small scale material but not so good on the big stuff. The REL subwoofers (Stadia?) were useless, could not enen begin to keep up with the panels. The ribbon hybrids are magical, driven by valves they are wonderful but they are also several hundred miles away in a foriegn land and in storage.
The small actives I use now were bought because they can become my desktop system in due course, not a serious system but they get used nearly every day and I've had them more than a year. Not bad for me........ :cheers: