Hi Neil, there was a thread I posted about them as they had a problem when I got them but I can't find it by searching. The voice coils were rubbing, but they are a very unconventional design. The bass unit has no conventional surround the rubber has been removed and the cone bonded to the planar panel. I suppose it give the 10" unit a much larger area to radiate. However, I think the design was flawed in that the planar panel is only secured at the four corners. To fix the rubbing coils I had to make wedges to place around the perimeter of the panel and this effected a cure...sort of, later on I had to add more as some strange buzzing noises started.

There is very little info on the net about these. All I could find from EAR is a show report from the US where they were demonstrated. Tim De Paravicini is said to have designed them, but he did not make them. I emailed him and he gave the info as to who had made them, but I didn't get any further. There were two sizes going to be available. I don't know if mine are the smaller or larger of the two. They were to have retailed around the £5,000 mark, but I have never seen anything to suggest that they were in fact ever sold.

Here is a vid I posted some time ago.

http://theartofsound.net/forum/showt...Drive+Speakers

The review I mentioned is here.

http://www.newaudio.it/ear_yoshino.htm