2003 Toyota Landcruiser.
I took everything apart and found some suspect wiring (one of the coils was not wired) that I repaired and it is now limping along.
I went ahead and ordered a new speaker (https://www.parts-express.com/Visaton-W170S-8-6.5-Woofer-with-Treated-Paper-Cone-8-Ohm-292-568)...