Jumpers are intended to replace the (often inferior) metal bridges between the bi-wire speaker terminals of speakers. Often such bridges are of (very) poor quality because they are made of gold plated metal. These are two metals with a much lower conductivity than silver, messing with the music signal in your loudspeaker crossover. Replacing these bridges with a decent quality cable and a good silver connector is therefore an easy and affordable upgrade for all speakers.
Our jumpers are sold as a (stereo) set of 4. They have a length of 20 cm. We terminated them with our own Highly Silver Plated Simply Audio Banana or Y-spade connectors. You can choose any termination configuration you like.