Are future improvements in Amp/PreAmps slowing to a crawl?

I understand - good luck to you and your daughter.

You two just restored my faith in humanity..

Roger - I love your focus and energy. Hope to hear your tech one day.

Kosst - good luck. Protecting one's children has a visceral immediacy that tenders everything else moot. 

toddverrone,

Saw your system - nice. You made all the cables yourself?  And the DIY resonators?

BTW - Your listening room is way too clean! 

Just out: http://www.stereophile.com/content/nelson-pass-circuit-topology-and-end-science

Dave