Before setting up and audio car system always remember that the speakers location determines your whole sound system, always remember that the distance amid the left and the right speaker is such that the connections made inside do not touch each other.
Now after placing the speakers and other devices, do the connection with the help of the wiring diagram given with the system. Always remember that the metal cabling is done in a proper manner because cables are the most vital link to the audio chain. If you mess up this section your entire system will fail. Always remember to use good cables, because better the cable better the performance of the audio system.