Nope. I never tried using the original E-Mats on the speakers. Using the mats on the speakers never occurred to me until my friend "Mas" came over for a listening session and brought it up. By that point, we were already into the *Plus* Mats.
On the crossovers ... I got inside and pasted the crossovers with Total Contact. That was effective. Then, I have some Alpha E-Cards on the outside of the speaker where the crossovers are. I guess that would be the equivalence of using a mat there, albeit, a small one.
The discovery of using the *Plus* mats on the sides and the rear of the speakers in line with the drivers made a HUGE improvement.
I don't see any reason the original mats would work, although, as I posted before, the new *Plus* mats do things the original mats don't do. It is not just about clarity and focus, even though the new mats are better than the old mats at that. The new *Plus* mats add a very important improvement in tonal realism. By that, I don't just mean to the instruments, but to the "air" around everything.
I just finished listening to a live Eva Cassidy CD. The sense of space in the venue was the best ever. Hard to explain other than "you are there."
https://www.youtube.com/watch?v=2rd8VktT8xY
https://www.youtube.com/watch?v=zNNs6Blk028
https://www.youtube.com/watch?v=K-X1g-aEeNc
Too bad she was taken at such a young age. She had a lot of music in her yet to share.
Frank