Bi-wires links for speakers ?

Good to know the Tellurium Ultra Black bi-wire links have brought a massive improvement to the system. It sounds like you have changed to a new speakers rather than just swapping out the bi-wire links.

Perhaps try switching back to the stock links and see if the sound quality gets worse?

Yes it does get worse once switching back to the stock links, I suspect they’re crap.I was considering an upgrade to higher level Proac speakers but the improvement was such huge that I am more than happy to stay with my current 140 MKII speakers.

😀

Since this post is fresh I now have just finished my ability to listen to jumpers made of the same cable and running single wires to the speakers. Here is the catch....the bass terminals I am trying a cheaper run made by the same manufacture and the more expensive to the midrange/tweeter terminals. FYI the cable is Stage lll Mantikor to the midrange and Stage lll Magnus Prime to the bass. Both use silver/palladium ribbon conductors with a slightly different layout. 
My Jadis monoblocks have 4 output terminals giving you a hint from France.
Knghifi was spot on above in my case. What I am hearing is a much better timed speaker with a bigger soundstage and separation of the passage. Bass is better integrated and there is no smearing as in the jumpers. You might not note the smearing until you discover it without. 
As good as the jumpers were and made with the same conductors my Gamut RS7i like the direct power from the amp. via wire in two single runs. I wished I could try two Mantikors but funds don't allow it. I will be switching the cheaper cable to the midrange terminals and seeing the results also.  This hobby is really about experimentation and being crazy over it. This is my findings as YMMV.

Glad that you experienced improvement too, that show you how cables  are very important factor at our system chain. 
After 2 weeks burn in period  of my new links I can notice that the integration between the drivers and the twitter is superb. Dynamics, agility and transparency are much better.