Patent ID: 7711125

Claim:
An audio distribution system comprising: a plurality of individual signal conditioning circuits each having a balanced line level input signal and a balanced line level output signal; means for spatially distributing the plurality of individual signal conditioning circuits in series along an audio cable so that for all of the plurality of individual signal conditioning circuits the balanced line level output signal of one of the plurality of individual signal conditioning circuits couples to a balanced line level input signal of the next downstream one of said plurality of individual signal conditioning circuits; and means defining a plurality of separate audio input control signals each for directly controlling a respective one of said signal conditioning circuits; each of said spatially distributed individual signal conditioning circuits including; a balanced to unbalanced signal converter coupled from said balanced line level input signal and for converting the balanced input signal to an interim unbalanced signal, a signal addition device coupled from said balanced to unbalanced signal converter for mixing the interim unbalanced signal with a respective audio input control signal to provide a composite signal, and an unbalanced to balanced signal converter coupled from said signal addition device for receiving the composite signal and providing a balanced line level output signal.