A few details on my removal of the stock Alpine sub enclosure for inspection and upgrade:
There is one single screw holding the enclosure to the body. It is located at the front of the enclosure nearest to the rear seat:
I used a t20 bit for removal.
I also removed the rear rubber seal at the rear swing gate.
Next I removed the seatbelt plastic surround and began to pry on the enclosure with my hands and pressure until all of the clips had released. I used where applicable, panel tools and pry tools but ultimately could not get the bottom post clip to release. Why?
The are 6 unique round main clips attaching the enclosure to metal posts. These are very difficult to release. I ended up cracking it on the bottom post clip but was able to get it out without destroying the clip
There are also several standard clips, these easily release.
Is has a single harness that is easy to unclip. Once this is complete, I was able to pull it out and inspect.
It does have a screw at the back of the enclosure mounting the subwoofer to the enclosure.
Sub removal: T30 bit, 8 hex screws.
There are four wiring harnesses to the sub inside the enclosure connecting the sub to 4 coils(?)
Green, Orange, Gray and Brown (+ and -)
I posted a few pics of the main components as well as the front and back of the enclosure, the rear of the sub and of the enclosure inside.
Hope this can some way help someone else.
Thanks, this does help!