u neen DC to AC converter .. for power setup ..
its has some different wiring setup .. what is ur pre ??
does it has 2 pair of RCA out or 1 ....
i saw splitters @ shop by which u can able to fit in ur car...
but this system is not recommended from my side.. its better to put a pair of speakers in ur car... this will not sound like it sounds when it connected to sound card of PC..