I spent an evening listening to them in a private lounge, driven by what I recall was a huge pair of VTL mono blocks, along with a Rockport turntable. I thought they threw a big image but I didn't like the midrange- I was at the time a long time Quad electrostat/tube guy. The same party had a pretty crazy studio and had a pair in the studio to monitor (among others, including little Wilsons). That pair of IRS sounded better. But we are talking about nearly 30 years ago.
There is a guy - "al rainbow" who posts at Myle's Astor's site. He has a pair, maybe modified, I dunno. It's been a long time! If you track down Myles, who is a pretty well known reviewer, you will eventually find "Al". Good luck.