OP - jumpers are just a pair of mini cables about 3” long with banana speaker connectors on the ends that bridge the left and right upper and lower binding posts. IME they don’t need to be the same as the speaker cable you’re using — they just need to be decent quality, and at these lengths it’s a relatively cheap tweak. I’d guess AudioQuest and others sell them at those lengths that you can probably buy from the likes of Crutchfield, Audio Advisor, Music Direct, etc. with a return policy so you can try them at home. Mine were made by Chris Sommovigo of Black Cat, and he was the one who recommended I give this a try and very glad I did. FWIW...
