Polk Audio Polk Remote Control Extension Cable New Condition. Are you in search of an extension cable for your Polk system? Look no further than this extension cable for your Polk remote control. Features of Polk Audio Polk Remote Control Extension Cable: Polk Remote Control Extension Cable MFG# PRCEC18 18 ft length. Included Accessories: Polk Remote Control Extension Cable Documentation Package Contents: Polk Audio Polk Remote Control Extension Cable Polk Audio PRCEC18: Polk Remote Control Extension Cable New Condition