I think because they have a signature sound. They do some things very well. If those things are what appeal to you, you are likely a fan. Cult type products tend to appeal to a small segment of the population who see them as special in some way.
Why do Harbeth speakers have such a cult following
Let me start by saying I'm not here to bash Harbeth speakers.I have actually listened to 3 different pairs before I bought my current speakers.I thought they sounded good but I don't understand all the hype around them.They seem to have a cult following like Linn and Naim. What is creating the cult following among Harbeth speakers?