Also, I have the abyss 1266 TC Phi, Utopia, Stellia. Previously owned Meze empy and Verite Closed. Would the Susvara bring anything new to the table?
Adding the Susvara to the Abyss TC, Utopia, and Stellia results in my headphone collection at the moment, heh.
Of the four, I feel like the Stellia is the one that sounds the closest to any of the other three (ie, the Utopia, ofc), but justifies its existence in the group due to being closed back, among other reasons.
It's very easy to justify adding the Susvara to the other two open-backs, as it sounds so different from either the Abyss TC and the Utopia. It's also the least fatiguing, by far. And in that sense it does remind me of the Stellia, actually.
Is it fair to assume that if my amps can drive my 1266, they would be just fine for the Susvara?
Pretty much, though anyone will tell you the Susvara likes even more power than even the Abyss.
IMO, the Susvara goes great with the AHB2.
The HPA4, of course, sounds basically identical to the AHB2, and is the main solid state amp I use with the Susvara, and drives it to a sufficient volume for my preferences, and definitely to a sufficient level of quality (depending on taste, of course, though if you already like the AHB2/HPA4, I'd see no reason why that wouldn't be the case with the Susvara as well).
The one watch-out with the HPA4 is whether it will drive the Susvara to a sufficient volume based on your listening preferences (and potentially whether or not you use "replay gain" on the digital side). I'd say it requires about +3dB more on the amp's volume dial for the Susvara compared to the Abyss to reach the same SPL output, so that ought to tell you enough to know, if you already use the HPA4 with the Abyss.
But are there any instances of driver failure or loose jacks etc? And if so, has anyone updated on costs of driver replacements?
I'm not sure I can recall a single report of wonky drivers or out-right Susvara driver failure from anyone on this thread or on this forum in general, which is saying something.
Compare that to all the anecdotal reports of TC issues -- buzzing in the left side, "sleeping" drivers (huh?!), etc -- seriously, what a joke.