Why not get some cable where u can bi-wire on the speaker terminal side. Or simply, don't bi-wire at all. Just take out the worse link in your system, which is probably the Sonance cable.
Speaker cable suggestions
I am just starting to play with speaker cables. Does anyone have suggestions for an anthem integrated biamped with a Parasound HCA 500 running to Paradigm Studio 60's? The anthem interated powers the midbass/midrange, and the parasound is powering the tweeters. I am using Straightwire Rhythm right now. Thanks for your help.