Any bookshelves with horn-loaded tweeters?

Are Triangle Titus/Comete Ex/Es of true horn tweeters with compression driver, or just usual cone/dome tweeters with a flare-shaped horn to increase efficiency at certain frequency?

I didn't find their crossover either.

Klipsch Reference monitors are inexpensive monitors which sound very good with tube electronics.I have a pair of Comete 30th Anniversary Cometes which are excellent monitors that use horn loaded tweeters. The 30th Anniversary Cometes are significantly better than the standard Cometes which I used to own and are very good monitors that offer great value at their price point and also need tubes to sound their best.

What makes the anniversary Cometes better sounding than the regular models?

I thought it was more of a packaging and finish job than upgraded components. How did the sound differ?

Thanks

Would you say the anniversary Cometes benefit from a sub...or is a sub not necessary?

A sub is absolutely necessary. They go to 50hz and sharply role of from there.