It's now about three years I own a Susvara and FWIW here are the things I learned: It was a giant effort to get them sound great to my ears but I'm glad that I didn't give up. When I got them, I was a bit underwhelmed: while super detailed I found them too light in bass, occasionally too shouty in the upper mids and sometimes sounding a bit compressed overall. I experimented with different amps and although this improved things a little bit, it never sound quite right to me. In the last months I switched to fiber-based network and suddenly it sounded right! Now it sounds punchy, holographic and so big without being shouty anymore! Bass quantity just improved slightly but it seems for the first time that the timing is right. This improved the bass quality and tactility so much that the bass is wonderful now.
The Susvara is really reveals the properties and faults of the whole system and now I can hear about every change I make to my chain. In my case fixing the source was the biggest step I made. Now different amps are just more of a flavour in comparison.
My advice for all people who struggle with the Susvara and have the feeling that something does not sound right: Don't focus only on amps to fix the sound. Maybe you have a source issue that other headphones won't reveal. In my case fixing this was much more important.
