I really like the Flamencos with my Allnic M2500 px25 tube monoblocks but I also enjoyed them through my Ear890 tube amps. Werner Jagusch crossovers improve the overall sound balance and they also enable mixing of 16ohm woofers with 8ohm compression drivers for the horns thanks to their autoformers.
also highly recommend upgrading the compression drivers to the Great Plains 902 -completely ended my endless search for upgrading my speakers as I’m so enthralled with the musicality of my Flamencos with these two key upgrades.