In 1972 Silo launched Audio World, a wholly owned subsidiary which sold stereo systems and audio components. Initially a few freestanding stores in the greater Philadelphia area, by 1974 Audio World departments were being incorporated into all existing and new Silo stores when the concept proved successful. The audio expansion came at the expense of small appliances whose profit margins had disappeared for Silo, which thereafter concentrated on retailing only large appliances along with the new audio and TV sections, and was branded as Silo/Audio World for a number of years.