I ordered a linkwitz transformer board to play around with and see how it sounds - I may end up getting more if the results are what is expected especially if it is flexible. With the transformer circuit can woofers with a EBP not particularly well suited for sealed direct radiators be used with good results? It is a high quality sub and I am sure that it doesn't have 3rd order harmonics like the write up in the driver selection area of the material states but I do not remember reading anything at all in regards to TS parameters when picking the driver.