Horn speakers , high efficiency but not “shouty”

Very nice...enjoy :-)

I have had my Charney horns in Cherry since 2016 with no cracking issues whatsoever! I live on the coast in South Jersey and we have high humidity year round with heat in winter and ac in the summer. 
Interesting how you can comment without actually having seen/touched/listened them up close. 

Yes you can crank up the volume with Charney Audio horns. As with any speaker your room will determine the effect. The Volti’s will play loud and clean but lack emotional engagement to the music/artist. More of a pro-sound if you will. The Charneys will draw you into the music and relate what the artist’s intentions are. It’s the difference between someone who can play the notes (Volti) vs someone who has command of the instrument and their personality is revealed (Charney).
I own Charney Companion horns and very happy with them.

newtoncr-You mentioned purchasing the Excalibur which driver are you considering?

newtoncr, congrats you’ve made a great choice! Which driver are you choosing for your Excalibur?

newtoncr, With a new amp, preamp, and speakers you will need a lot of run in time. Probably in the 300-500 hour range. You have a lot going on right now that will affect the sound.  Tubes from Andy are a good idea. He knows his stuff and good tubes do make a difference. Tell us a little about your room. Size WDH? Treatments? Flooring? Speaker placement etc....

When I got my Companions it took a few weeks of run in time just for them. I have a basement room where I was able to use an old receiver. Wired the drivers out of phase and had them face each other about a 1/2” apart. Put the Isotek burn in disc on continual play, turned up the volume and let them go for a few weeks. Even after that the drivers were still a little tight and sharp. Then all of a sudden bloom! Be patient it’s worth it! 

@newtoncr I had a conversation with Charney about your issues and he confirmed the problems you've been having. One thing though, according to him your room is 12x20 but the rear wall is open to a much larger room?  So the speaker is actually trying to accommodate a space possibly out of the range it was designed for? Can you confirm this it would help for offering suggestions.