How do you remove the rear speakers from a 2002 Toyota Celica?

you have to take off all the trim starting from the piece in the boot against the rear of the car. For each piece, take out all the screws and then pull (there will be some force required because there are also plastic clips holding these in that pull out). If the piece isn't budging, you're probably missing a screw.

Once the trim is gone, I think you have to drill out the places where the speaker is held into the frame. Either that or they screw out...