Speaker cable for Green Mountain Audio Callisto

when I was at the factory listening to the Callisto, the speaker cable was Virtual-Dynamics Master. Superb sound! I do not know what other speaker cables used before at the factory might have sounded like so I have no comparison metric for you. However, the V-D Dynamics was excellent sounding. Their sound/tonality reminded me of the TARA Labs Master Gen2 speaker cables I personally use. FWIW. YMMV.

Elduende14,
I have been following this thread regularly & note the interesting discussion of what the cost of the cables should be in relationship to the cost of the components. I noted that both sides of the coin are represented here (towards which I have absolutely no problem, just wanted to make that clear up-front). (what a revelation! this is audio & both opinions are well represented! LOL!)

Re. speaker cable recommendation: I've been toying w/ the idea of making my recommendations FWIW. So, what the hell, here they are for whatever it's worth:-
Luminous Audio Synchestra Reference (the copper cables)
TARA Labs Master Gen II or Decade
Virtual Dynamics Master

ALL the above cited speaker cables have the same general tonality. I have heard all three of them & I personally use the Master Gen II myself.
The tonality of these 3 cables is very similar to your TARA Labs Decade interconnect. If you like this fantastic cable, you'll like any of the 4 cables suggested above.

I've also read that Paul Speltz's "anti-cable" speaker cables are very good sounding & good value of money. I've also read that same for Mapleshade's speaker cables. I believe that these cost $75/ 8' pair & there is an upgraded version that costs $150/ 8' pair. No personal experience w/ either of these.

yet another speaker cable is the Sonoran Plateau from Audio Stillpoints (the folks who make those brass cones & that Harmonic Precision Caravelle speaker). IMHO this cable has a little rich bass & it's a bit boomy to *my* ears. People, who I know use these, think otherwise.

YMMV.