Single adapter Single adapters solve a wide range of day-to-day signal tasks, from converting a 1 / 8 "headphone plug to a 1 / 4" plug, to turning a microphone cable's XLR plugs into 1 / 4 ". The adapters are ergonomically designed with a durable polymer overmold for extra protection and easy gripping. Plus, Planet Waves adapters are fully shielded and have 24-karat gold-plated contacts for maximum conductivity and corrosion resistance. For secure fit, Planet Waves' patented compression springs are used on all single adapters with male or female 1 / 4 ", 1 / 8" and Banana plugs, and male RCA plugs.