Horn speakers are really bright?

in homes i've heard mellow klipsch speakers and harsh klipsch speakers, sometimes among the same model. i've heard sharp khorns and mellow khorns, i can only conclude it was the room and/or electronics that did them in. in the showroom, the tower klipsch speakers invariably sounded "hot" and "upper-midrangey" compared to the speakers next to them. 

I have listened to Klipsch speakers since 1975, I have found everyone painfully bright.

Not quite (technically) horns, but the waveguides on my JBL 4349's are delightful.  I can listen for hours with no fatigue and they fill my room very well.  Took a bit to get the right amp and preamp match though.

Magnepan that's bright.

For me, sound that is homogenized with your surroundings is most important. I cannot imagine mine getting better, as a renter, than I have now: converted one-car garage  room, floating floor on Pergola ( air space) under my Klipsch (gen. 1) Forte powered by Cary Rocket 88 tube amp, controlled through a Schitt equalizer, into the new Bluesound Node. I sit slightly further away from my Fortes than they are distanced from each other… in an electronic Lazyboy, and enjoy watching TV sports (while turning off Joe Buck’s “diarrhea of the mouth”)… listening the the primo DAC in the Node stream worldradio stations from all genres, Bluetooth from my iPhone, CDs from my Sony, or HDMI ARC  off my YouTube TV.  It’s pure BLISS!