The answer goes as follow: miniDSP was indeed sucessfully implemented in some cars. However, note that car environment is one of the harshest environment to deal with and miniDSP kit unbalanced was not designed for the purpose (e..g balanced input to reject noise, REM..etc) Lack of grounding, noise, dirty power, all the bad elements are in a car. If this is your first install, best to read more about it.

To simplify the task, miniDSP engineering team designed a dedicated add on card allowing Remote IN, Remote Out and most important DC-DC isolation. Please refer to the miniDC Isolator product page for more info.