Looking for my Final Pair!!

daveb,
I actually tried a bought an inexpensive set of planar magnetic supertweeters to augment my speakers last year, and found them to be disappointing. The ones that I bought sounded sort of "dry". However, 3 weeks ago, I finally bought a set of the Townshend ribbon supertweeters, and I have to say that they are as good as I had heard that they are. 

I may have to try them as well!

Anything I buy from now on must be fully returnable...more fun that way and less stress when evaluating 🤔 

Not a bad idea dave_b. I would never buy a Townshend product for the same reason I would never buy a Walker product. Their marketing is insulting and most of their products are totally worthless if used as directed. Adding supertweeters to loudspeakers is a matter of taste not accuracy. These tweeters run down to 6 kHz and will be very audible. This might make some people think they are getting more detail but what they are really getting is a brighter more confused treble. Unless you can get the super tweeter within 1/2" of the tweeter in the loudspeaker they will be perceived as two separate drivers. Can you tell if there is only one trumpet playing vs two? You want the speaker to speak in one voice. You will notice that in line source speakers using dynamic drivers like Bob Carver's Ultimate Line Source the tweeters are stacked in a line very close together. In this way the are forming a single line source. With an add on tweeter you will always hear it as a separate source and it will always sound...artificial. Experiments we did way back with Decca ribbon tweeters bore this out and we stopped selling them as add-ons. 

roxy54-

However, 3 weeks ago, I finally bought a set of the Townshend ribbon supertweeters, and I have to say that they are as good as I had heard that they are. 

Always good to hear from experienced audiophiles who actually listen and know what they're talking about. Thanks!