What’s the difference between in-wall speaker wire and speaker wire?
In-wall speaker wire is constructed to specifications set by UL and the National Electrical Code (as written by the National Fire Prevention Association) so that it is safe to be run through the walls of a residential structure. When materials are put inside the wall of a home, they can provide a path for fire to spread from floor-to-floor or room-to-room. The jacket or outside insulation of in-wall speaker wire is manufactured from compounds that help slow the spread of fire.
