hey im completlly new to car audio and i just bought a 98 4x4 4runner and im already in love lol. but i need help replacing the factory system and tips for subwopofers. with the subwoofers im gonna build 4 different enclosures that form a box in the back of the car. so if i need the space i can unconnect the woofers and take out the box. idk the exact measurements im gonna take them 2marrow but what are some good woofers to put in these boxs and which amps should i use? i know nothing about car speakers or anything so i really appreciate the help