I recently had my Apogee Duetta II Signature Series magnetostatic full range ribbon speakers upgraded completely with top of the line Graz ribbons, Wilson caps/crossovers generally, internal and external strengthening, etc. I’m absolutely floored with how incredible they sound from top to bottom. Stock they’ve been incredible since ‘88, but they are now at a whole different level. Exceptional in every way. Have to experience them to understand!
Also, soon I will be greatly improving my BlueSound Node2 with a Teddy Pardo external power supply. I only use it for streaming. I can’t wait since my streamer is in my opinion by far the “weakest” link in my signal path.
Cheers!