I went to the website you suggest for the tweeters- weird site. Absolutely no Contact Us information, no address, no "About Us", no email contact info.
Also, the pair of "new AMT Tweeters" they promote for "250 a pair" are qualified with a note about be prepared for delays in shipping. And the photo they use is of a well worn, dog eared package of a tweeter and they don't show the tweeter itself. Additionally there are zero specs listed- nothing about impedance, freq. response, efficiency, no response curves- nada. Clicking to the related site gets you the same. All of it looks ameteurish and or bogus (to me). I was going to call or email them for the specs....

