Ah, my local college must suck then because they do 4 days tuition and 1 day working.
To install a bad ass sub install in boot please follow these instructions
remove spare tyre, tools and all the crap that seems to accumulate in there
add sub box
add side plate
Add sub
fit amp and connect all wires as needed
insert top cover
have a cheeky test play of the LEDs
insert amp access panel
and finally insert sub cover disc
removal is reverse of installation
now to find a new sub without a big crack down it
(its not as rattly in person and the iPhone cant pick up the sound properly)
Hope you re-sealed that box well, main area where water comes in the car