s70

Hey guys I'm working with a 99 Volvo s70. Just doing a sub and amp in the trunk but I want to do it right. My last setup I spent way too much on (Mazda b2300 xcab, 2x RF 800a2's, 2 eclipse ti12's, alternator, etc ) and when it got stolen I left the car audio game for a while but now I'm back...