To Bi-wire or not?

I was using Tara Labs shot-gun cable to connect my Usher speakers, leaving the jumpers in. When I switched to Blue Jeans cable and true bi-wire and removed the jumpers. I hear no improvement, in fact i lost some bass. I contacted Blue Jeans to see about cable burn-in but they said burn-in is a myth. I have heard that bi-wiring a speaker with low end cable is better than using higher quality cable in non bi-wire application. Any thoughts?