There are no universal truths here, there can be noticable improvement bi-wiring but it depends on the crossover design of each speaker, some benefit more others hardly any.
Even when benefits are realized you have to determine if they are greater than just spending 2X as much for better main speaker cables......some speaker designers take the decision out of your control and only offer one pair of binding posts.
Even when benefits are realized you have to determine if they are greater than just spending 2X as much for better main speaker cables......some speaker designers take the decision out of your control and only offer one pair of binding posts.