I looked at the Canare 4s11, but it was only 14ga, and I wanted to get to 12 ga.
The 4S11 is 14 ga x 4 wires. If you single wire vs bi-wire, combining two 14 ga wires drops it down to 9 ga (or something like that).
Not to open this can of worms, but I haven't heard much difference/benefit when bi-wiring my speakers in the past. I guess it depends on the speaker. My current speakers don't have the bi-wire option.
I've always gotten better or at least comparable results to bi-wiring by removing the brass jumpers and replacing them with short runs of the speaker wire I was using. Replacing the brass jumpers always gave me an improvement.
I've also heard differences when connecting the positive to one terminal and the negative to the other terminal (ie positive to tweeter terminal and negative to bass terminal). There's also been a difference when connecting the wires to the bass terminals vs the tweeter terminals.
Reversing phase with the wires also makes a difference - connect the negative to the positive, and positive to the negative at one end only (ie the speakers and not the amp) on both speakers.
Sorry if that stuff sounds confusing.
None of that stuff makes sense scientifically, but I've heard differences in my speakers. I'd try this stuff before investing in new or more expensive speaker cables.
