Audioquest DBS vs Synergistic Research Tesla?

You simply cannot buy cables on other people's recommendations...especially in a biamped system. You must hear the way your choice interacts with everything in your room. Duntech's are great speakers and will reveal great differences in cables. You must listen for yourself.

I agree with you that the Duntech reveal great differences and I must try myself. I have owned AQ Midnight, Cello Strings, MIT CVT 770 an Yter, and I'm not fully satisfied with with the results. Next week I will try a pair of PAD Proteus....

Here in Spain the AQ and. specially, the SR are very very rare to find. I read a lot of good opinions about this cables and I think that could be a good option for my system.

Maybe there is not a clear winner between the speaker cables of this two brands. But could someone tell me the main similarities and differences between them? (SR Precision Reference vs AQ Volcano, Kilimanjaro or K2)

Yesterday, I spend a couple of hours, with two audiophile friends, doing a comparative between my Yter speaker cables and a pair of PAD Proteus Rev. B (biwire, but with only one pair of spades connected to the highs binding posts and the other left unconnected; we cannot check the fluid level inside the cables).

Our results were: definition in the voices with the Proteus were superb, and also the definition in the middle and middle bass was superior.
The Yter was however more dynamic and open, specially on tops, and produce a more lush and pleasant sound. The piano notes in the Yter were more open and rich, with more transparency. The soundstage was also a litle big with the Yter, and the room was more filled with sound with it.
Conclusion: for me no one of both cables was a clear winner.