Why do you think Bi-Wiring improves the sound ?

HI, 
Check first that you like the sound by moving red to tweeter (upper raw) and black to woofer (lower raw) in X configuration leaving the jumpers on.
That will give you increased highs and more forward presentation.
Simple before spending for Biwiring.

It doesn't improve the sound. I just use the jumpers.

There’s technical reasons it works and you can search around and read them all and decide for yourself how much of the Kool-ade you want to drink. If any. Because the fact is it works, and does sound better, at least sometimes. So what? The question is never does it work. The question is how good? And compared to what??

Those are always the questions you should be asking. Because unless the bi-wire is just sitting there in a drawer or something for free, then what you really want to know is what will get me the best sound for the money? And the answer is never buy another set of cables just to bi-wire. Buy a better set of cables. Period.

Oh by the way, "unless the bi-wire is just sitting there in a drawer" that was me back in the beginning. Wire then was cheap hookup wire. So I tried it. It worked. Twice as much wire, 10% better sound. Okay 5%. Whatever. Point is better. So it does work. Twice as much wire is one thing when its coming off a reel. When you get to $500, $1500 and more, well you do the math. Not worth it.

To explain , when I said converting to bi-wire I meant adding 
speaker posts and re-configuring the crossover wires .
One guy did a test using individual wires of 18 gauge ( 1 @ for per post )
after liking the bi-wire configuration he re-wired the crossovers back to a single wire setup and then used both 18 gauge wires ( 2 @ per post )
he  like the sound of the bi-wiring better !
so increasing AWG was not a factor in his conclusion .

Lol! To explain, my post is so clear it doesn't need to be redone even in the face of this new information.