I never quite connected with the SR-1a. Not sure why, maybe I didn't get the adjustments right or something. The CA-1a blows me away though. After owning so many headphones from Hifiman, Audeze, Focal, and Sennheiser, some of which I liked and some not so much, the CA-1a just scratches the itch like no other. Which is why I'm intrigued by the Immanis.
Very curious why there seems to be much less interest in the Magna. Maybe people just figure if they are going high end anyway, they should just go all the way? I just wonder if Magnus is similar but lesser than the Immanis, or if it has a distinct signature that sets it apart. @yyzsantabarbara were you able to try both or just the Immanis?