Horn speakers are really bright?

Variables include amplification, room, horn materials, for example plastic, metal, wood, quality of crossover. physical layout of mids and tweeters, for example some Klipsch  align  tweeter closer than mid, result may be excess brightness, high frequencies travel faster than lower freq, and they may beam more based on horn design.

If timbre incorrect, brightness perceived. Timbre most difficult thing for horn speakers to get right, IMO.

As mentioned already, Klipsch speakers can be as bright or dull as your room and components allow. But once you get it right, not much else compares to horns. The key is sweating the details, these are not plug n play speakers. If you aren't willing to devote some time and money in placement, room treatment and a good front end, move on to something else.

Oz

I have klipsch speakers and I think they are quite awful. Terrible for music with the exception of maybe rock and a few other genres. I tried a bit of everything and couldnt get them to sound good.

I now use them exclusively for home theater and I think horn speakers are well suited for that

My comments above are strictly regarding the Heritage series. The only other Klipsch speakers I have owned were KG 4.2s and they were just ok.

Both systems are unnaturally bright. She has way too much breath in her voice and her "s" is way too sharp. This is an audio effect that many people mistake as detail and find attractive at least until it hurts. They also used too much reverb in the mastering. This is not necessarily a result of horns as I have heard them sound quite natural. Your systems are not well set up. Speakers that size should be much further apart and toed out a bit may not be as bright and in your face. It is not your electronics doing this. It is the set-up, the speakers and the rooms. You need to go to a small jazz club or somewhere you can hear an acoustic folk singer. Go to a Richard Thompson solo concert. Don't listen to me. I'm just another idiot with bad hearing.