Jl Audio, Inc.

Campbell Kelly

Bruce MacMillan

Carl Lindquist

Manville Smith

Felix Matro

A system () and method () of equalizing an audio signal from an existing radio or head unit () using an interface unit () between the radio or head unit and a replacement load () can include the steps analyzing () an existing equalization to provide a measure of an existing frequency response, generating () a substantially inverted frequency response to the existing frequency response, and applying () the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit () having an automatic input level control unit (), an analog to digital converter or digitizer (), a DSP () providing an output to a DAC (), a level booster unit () and a processor such as a microcontroller unit ().

Method and system for equalization of a replacement load

A system () and method () of equalizing an audio signal from a factory installed radio () using an interface unit () between the factory installed radio and a replacement load () can include the steps of measuring () an existing equalization for the factory installed radio in the interface unit, analyzing () the existing equalization to provide a measure of an existing frequency response suited for an old load, generating () a substantially inverted frequency response to the existing frequency response, and applying () the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit () having an automatic input level control unit (), an analog to digital converter or digitizer (), a DSP () providing an output to a DAC (), a level booster unit () and a processor such as a microcontroller unit ().

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Frauenfeld, Switzerland

Campbell Kelly