What brand t-line speaker kit are they from? Fried used these in Model T.D and O. Are the voice coils 33mm or 55mm, plastic or cloth dust caps? I see that Kal knows about these drivers also. I would like to know the specs Kal has compared to what I have been told about the driver parameters many years ago. Most people never heard of this company. The oem units Fried used were the best bextrene cones. I had to reglue surrounds to driver frame over the years.