Other Good High End Audio Forums

Audio science review has a really experienced and knowledgeable group of regular participants.

I spent time at ASR, they know tech a great deal. I'm afraid that their approach to science and audio didn't make sense to me.

You mean not a bunch of old, jaded women with more money than taste? Yes, I agree. 

Can NOT recommend Computer Audiophile forums, now self-styled as Audiostyle or some such blather. In theory it should be a good forum, in actuality it's something else. Some of the most toxic posts and posters I've seen. They have been beating dead horses over there for years.

I'm predicting this post will be deleted by day's end.

I enjoy the forum PS Audio has on its website. It is not exclusive to PS products and generally free of hyperbolic discussion.https://forum.psaudio.com/