This system provides music in stereo for three separate zones. Applications include hotels, multifunction rooms or distributed stereo in homes. These are the requirements:
This can be accomplished with:
All of the DSP required for distributed background music selection, room equalization, speaker protection and Level control is included in the HAL3s. Each of the three outputs has a limiter to protect the speaker, and each zone is preset with a maximum loudness. Parametric equalizers are used in the example, though 30-band graphic equalizers can replace these or be added.
The RAD6 is used here only to provide a second stereo source. If only a receiver is used, and the music source is centrally switched from that, the RAD6 can be removed, and DR1 remotes can be used to control room volume.