Klipsch gets hate because very rarely do you hear from a Klipsch owner that hasnt spent a decent amount of time and money modifying them. Klipsch fans can be a bit militant probably due to the fact that many feel Klipsch are probably the worst representatives of horn sound available. Also they have sold a ton of speakers and are/were successful.
Volti audio upgrades for klipschorns
I bought a pair of Klipschorns in 1982' in 2018. I did a complete voting audio replacement. In addition to converting to tubes. The replacement was more than I could believe. I will not go back. the increase in quality was more than I could have believed. I would highly recommend this conversion.