I read your review of the Sundara. Glad you gave them a recommendation, they're good cans. However, most of Hifiman's headphones (and planars, generally) need time to burn in and loosen up from fresh out of the box. They recommend 150hrs (Ananda & Arya, can't remember about Sundara) but results can be heard after about ~20-50hrs. Pink noise and brown noise over a few nights works well. It's been my experience that the bass deepens, bass texture increases, treble sharpness and peaks smooth out, and soundstage widens and vocals/instruments becomes more layered. I currently own Ananda, Arya, 400i 2020, t50rp mk3. I used to own Sundara. Burn in has benefitted all of them, t50rp not as much. Would be glad to hear from those who've owned Sundara and Ananda for a few months.