both the audio source 12 and the dsp 14 a plurality of operator inputs 18 20 22 are provided and are each in communication with the micro controller 16 for sending associated control signals to the micro controller 16 in a preferred embodiment of the present invention the operator inputs 18 20 22 include volume bass boost and treble control the dsp 14 further communicates the audio signal to a power amplifier 24 which communicates an amplified signal to attached speakers 26 for generating sound the power amplifier 24 preferably includes a clip detector 28 for generating a clip signal as the audio signal reaches a predefined power limit the power amplifier 24 is in communication with the micro controller 16 for sending the clip signal to the micro controller 16 the micro controller 16 manages the overall function of the audio reproduction system 10 taking into account operator inputs such as volume bass boost and treble control depending upon the operator 39 s input the micro controller 16 sends digital control signals to the dsp 14 for controlling the variable gain stage of the audio signal processing the control signals command the dsp 14 to determine gain for both a narrowband signal i e bass and a.