Any bookshelves with horn-loaded tweeters?

I had the Triangle Comete es. nice speakers didnt know they were loaded tweeters is it the tweeter enclosure?

I think the newer version Triangle Titus have a horn loaded tweeter. I have older XS model which does not.

Don't forget Amphion, although there's not much 'horn loading' with their shallow waveguide. Also there was SP Tech now Aether Audio, although it looks like that company is about to go under for good. There's Geddes which makes a few designs using pro sound woofers and compression drivers in horns. Technically even KEF co-axials would count as a waveguide with modest horn loading.

And although they're both large, we (Vapor Audio) made 2 stand mount speakers with waveguide/horns, the Arcus and Aurora.

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.