In the early 1950s, the tape recorder also conquered the domestic sphere. The devices were easy to use and delivered good music quality. Devices came in portable cases which reflected the lifestyle at that time. But the devices were expensive: brand new, this device cost 398 DM—almost a full month's wages. Nevertheless, home tape devices experienced a sales boom—by 1963, 25% of households had a tape recorder. At the beginning of the 1970s, the robust audio cassette recorder replaced the tape.