In 2002, Revox introduced with the Re:system M51 a modular audio video system in the market. This system can provide up to 32 rooms in 4 different listening zones with music. Different modules allow the user to select which sources he would like to use in his home, available sources (modules) for the M51 and M10 are amongst others FM-tuner, SAT-radio, Internet-radio, Multiroom, Audio server and also Audio streams. Solutions are available for all imaginable application possibilities up to the control via Apple products with the corresponding Apps. The operation of Multiroom require the availability of the corresponding Multiroom module and small amplifiers of the type M219 in the remote rooms. Also the first audio server of the company, the Revox M57, was perfectly in line with the Multiroom concept.