HI Wayne,
The monsoon planars are about 7 inches by 4 inches. They go up from 200 hz up. Below that is a sub, with an active crossover. A cheap little sub with cheap electronics, but decent.
The whole system is available on ebay nowadays fro about $100.
I am listening to it now, in my office.
It is as good as anything I have heard, in IT's INTENDED listening env, which means, on a desk, with about 18 inches of reflective surface. I think the planars are engineered to make use of the reflective surface, to provide a clean signal to the listener. SOund is very clear, and clean. Imaging is great. Highs are very nice, and effortless. Bass is very adwquate, surprisingly, given it is crossed at 200HZ. Imaging does not appear to be affected.
Overall, very very satisfying. They also serve as a gret reference for my home built speakers.....i now know for example that my home systems are pretty decent too, since they compare well to these "reference" computer audio system!BTW, i got the idea to buy them from reading their review in the audio critic, written a couple of years ago. Peter aczel said they sounded as good as any high end system, in their intended environment. He was right.
The monsoon m1000 was designed by David Clark, who apprently also does a lot of audio design for automotive environments, and knows how to take advantage of reflective surfaces. All i can reiterate is, these are darn good!
-akhilesh