Separate names with a comma.
I believe it has to do with the #strands/wire combination. e.g. the STR7Ref is a 7-strand one core, and 7 cores into one wire.
Again, I think posts about any of the headphones - Susvara, Abyss, etc - isn’t going to be as beneficial unless the paired amp is mentioned.
My thoughts of the Susvara seem to echo @gordec’s especially w.r.t. the Susvara & SR-009. Having the right amp to drive either matters though....
Some posts have been deleted. Let's not stray off topic folks as it just prompts others to start posting OT pics on the thread.