Is there anyone out there who knows anything about Essence Speakers by Dale Pitcher?

It is odd that the sides are covered in speaker fabric, Dale loved to use glossy finished exotic woods for his cabinets. I would need to know the dimensions of the speakers and see a photo of the connections. Also using a flashlight carefully try to determine how many speakers are in the units. From the pic they could be Topaz Subs or early Topaz 6 or Amethyst 30 but I need dimensions to be sure.

And to all who have responded to my first inquiry I truly appreciate your contributions to the discussion. And to mre28m5 thank you for sharing your information. I was never introduced to the speakers you mentioned nor John Wright. I followed up on your comments and read up on both the speakers and Mr Wright.  I seemed so have missed much in the years gone by. There are so many wonderful vintage pieces of equipment lost and unappreciated out there. 

csmgolf is correct in his remarks and he has been a  big help to me when I first asked regarding my topaz units. I have the older 1985 units and they also need the Wave Launch Charts specific to my model. The later 1997-1998 units are the units you are looking at purchasing. They are very seldom seen and from what I have come to find is that VERY few were sold. A rare opportunity. If they sound good are fully operational I wouldn't hesitate. That is if I were 20 years younger, had the cash and could keep another set of large speakers hidden from my CEO/CFO  aka The Mrs. By the way. If there are any readers out there who have an extra set of  Topaz Supertweeters that go with the 1985 Topaz 6 units I would be interested in them. I think my units were originally purchased as Topaz 4 units (without the supertweeters) which would have made then Topaz 5