I think part of the problem are people's expectations after reading so many head-fi posts about Susvara out of more powerful amplifiers. I for one, tried Susvara on my Bartok and liked it enough that I wanted to purchase it. But, people were telling me that Bartok's 2.8W into 66 Ohm solid state amplifier is under powering it, so I added an external amplifier Viva Egoista 845 (15W per channel monster) and heard very little difference, that would warrant the 12.5k EUR asking price. I also agree fully with
@smodtactical 's impressions about 1266 vs Susvara out of Bartok and also, that it did not change much after trying them out of Viva. Susvara's soundstage was more intimate in comparison to 1266 and the detail seemed less in my face with Susvara, compared to 1266. I loved Susvara's mids, so much so that I almost purchased them, but when I heard 1266 out of Riviera AIC-10, I changed my mind and purchased that instead, as it brought warmth and forwardness to 1266 mids, and "fixed" its gaps. Now I have Bartok for EDM and Riviera for everything else. I know this reads as an Abyss fanboy, but please recognise that I did have Susvara for 2 weeks of extensive listening sessions (I took some days off from work to give it real go) and I did try more powerful amplifier as well, to ensure I am not "under powering" Susvaras.