Sound reproducing system with superimposed digital signal

A home use sound reproduction system for customer installation, comprising:

• a control unit, having:
• a power input,
• a user interface, allowing at least one of volume control, bass control, treble control and sound source selection,
• a digital playback input,
• a digital speaker output,
• the control unit being adapted to provide digital signal transfer of S/PDIF signals directly from a playback unit, connected to the playback input, to one or more active loudspeakers, connected to the digital speaker output;
• an active loudspeaker, comprising:
• a loudspeaker cabinet,
• at least one loudspeaker driver, and
• an amplifier unit included in or arranged beside the loudspeaker cabinet and being arranged for driving the at least one loudspeaker driver;
• and
• a two-lead speaker cable adapted for supplying at least 160 watts continuous power, being adapted to directly connect the digital speaker output of the control unit to the active loudspeaker by bare lead ends without any connector;
• wherein the control unit and the active loudspeaker are separate physical entities, which are positionable at a distance from each other and interconnectable by the cable;
• wherein the control unit is arranged:
• (i) to control sound parameters and send both a digital sound information signal dedicated for digital transfer of S/PDIF sound signals and a direct current power signal for powering the amplifier unit through the cable, and
• (ii) to superimpose the digital sound information signal, in the form of a single ended or differential digital signal, together with the direct current power signal on at least one common lead in the cable, wherein the S/PDIF sound signals directly received from the playback unit are superimposed on the power signal without an encoder.