Some of John’s influences:
Spica TC50 https://www.stereophile.com/standloudspeakers/446/index.html
Snell EII http://www.snell.no/the_archives_type_E.htm
Sonus Faber FM2 https://www.stereophile.com/standloudspeakers/870/index.html
Audio Physic Step https://www.stereophile.com/content/audio-physic-step-loudspeaker
Check out DeVore Fidelity, https://www.devorefidelity.com/
The DeVore Orangutan Reference, https://www.youtube.com/watch?v=pxVH-pMg9wA