Patent ID: 8050418

Claim:
An audio system for a vehicle comprising: an amplifier including an audio channel input, the amplifier including a processor adapted to switch between an audio mode and a reconfiguration mode, a head unit including an audio channel output connected to the audio channel input of the amplifier, the head unit adapted to transmit an analog signal on the audio channel output to the audio channel input of the amplifier; where the processor is configured to process an audio signal included in the analog signal received on the audio channel input in response to the processor being in the audio mode, the processed audio signal output by the amplifier on an amplifier output channel to drive a loudspeaker, and where the processor is further configured to process the analog signal to reconstruct digital instructions encoded on the analog signal received on the audio channel input of the amplifier in response to the processor being in the reconfiguration mode, the processor further configured to reconfigure operation of the amplifier based on the digital instructions reconstructed from the analog signal.