c, the merlin lead free jumpers are the right gauge so they allow a perfect balance between the woofer and tweeter. with them being lead free the sound will be less pointed, more expansive and tonally fuller. it may make you feel better to use the bi-wire but in the end and after a long critical listening, the jumper is best. unless your bi-wire is lead free and 15 guage on the tweeter which is doubtful.
chris, the speakers are set up for bi amping again with the right gauge wires.
i do so at home with marginal improvements.
best,
b