What are jumper cables sir? sorry not too familiar with cables? Jumper cables I know are the ones used in car batteries, hehe. What effect did this tweak give you?
ganito yun bro, pampalit sa 2 jumpers ng 4-terminal bi-wirable speakers:
personally i haven't tried these, my tin ears won't probably perceive the "improvement" of a few microhenrys inductance, milliohms resistance and picofarads of capacitance in such a short length of wire.