No! Bi-wiring does NOT improve the sound if your speaker gauge is sufficient to the situation. As mentioned doubling the gauge of the wire “could” help... but maybe not. It is probably the least expensive “Audiophile” tweak you can try but do try and let the rest of us know it it actually works for you! I’m willing to bet it will make no difference in the actual sound.
** actual results may vary :-)
** actual results may vary :-)