Great idea to attend AXPONA 2025 - both Harbeth and Volti have demo rooms.
When I was searching for my first high-end audio speakers, demoing speakers at audio shows was very helpful. There were a lot of great sounding speakers, but few that deeply resonated with me. After I narrowed my speaker choices, I went to AXPONA 2022 to demo, and ended up purchasing the demo Vimberg Mino D for a great price.
The Volti and Harbeth are sonically very different. I own the 100db highly efficient Volti Rival to explore tube midrange sonics starting flea watt amps I choose this speaker for it’s high efficiency and sonic neutrality- I wanted to hear various tube amp differences. I also heard the excellent sounding Volti Razz at audio shows. They sounded quick and effortless like most horn speakers.
Harbeth is a more musical speaker that matches well with Hegel electronics. Maybe someday I’ll get this great combo for a 3rd system.