I have my Townshend Maximum Super Tweeters Ribbons sitting on top of a rubber/cork/rubber block on top of my Montana EPX Speakers. From the beginning, the Montana EPX speakers always sounded very realistic and pleasing to my ears.
After approximately eight hours of use, I do agree with several comments that bassdude stated above (7/17):
1) "They actually increase the detail resolution from the bass, through the mids, to the highs. The leading edges of notes in all frequencies become sharper, faster, clearer; bass becomes better defined, more textured, and more solid / less boomy; as all frequencies do. There is more presence and a larger, deeper, more airy, life-like soundstage, with more precise image placement and separation. Highs are clearer, with more detail and shimmer".
2) "The sound emanating from the Super Tweeters is not prominent/noticeable in any manner – you can barely hear it when you isolate on the Super Tweeters. But, the aggregate sonic image is noticeably enhanced in virtually all respects – presenting a more life-like sonic sound-scape and image".
I noticed after several hours of play the Super Tweeters and supplied cables lost their tinny sound and blended in very realistically with my current speakers.
To try to explain the effect I would say it was similar to using a very good integrated amp from the 1970's that gives the listener the ability to adjust the bass, treble and especially the high frequencies.
I ordered my Townshend Maximum Super Tweeters Ribbons from Nick at Emporium Hifi (he is a UK dealer) and received them in less than a week.
I'm happy!