AudioQuest's PreAmp Jumpers replace the standard metal pins found on most receivers' pre-out/main-in loops with precision-engineered connectors that significantly reduce distortion across this critical signal bridge. Many audio systems overlook this connection point, allowing inferior metal contacts to degrade sound quality and introduce unwanted coloration. These jumpers restore clarity and transparency by establishing a low-distortion path through the pre-amplifier circuit, resulting in noticeably cleaner, more articulate audio throughout your system. A simple upgrade that yields measurable sonic improvement.