90s Ford Explorer JBL system and Blowing its Subwoofer

Checking out this old dirty oil coated sound system from a 1993 Ford Explorer and getting it working, than abusing the foam rotted 6. 5 inch subwoofer driver 0:00 Intro 3:40 Something loose in the amp 4:50 Give it power 7:05 Does it pass an audio signal 8:54 Quick audio tests 9:45 Wiring 11:56 Crossover networks 13:43 Closer look at subwoofer 15:40 Subwoofer testing (using its own amp) 18:09 System test with different subwoofer 19:35 Mid, high look inside 21:08 Test subwoofer with large amp 22:05 Lift off 23:39 Coil repair 24:35 Coil overloading