[Stl-986]

Do yourself a favor. Replace the factory amp. Go with a MB Quart na2-500.5 Use any 5 1/4 sub from a component set. It will just drop in. Wire to doors to the sub output of the amp. This then allows you to wire up speakers in the storage tray for the rears. I have this setup in 2 Boxsters. Amp will go in the factory location as well. Replacing the dash speakers will make the most impact as the factory original ones are most likely shot at this point for most cars. Of course to do it right you need a HU that has 6 channel output but if that isn't the case there are ways to split out the front or rear and connect to the sub input.

Good news is that the wiring is already at the same place as the amp for the door speakers so you dont need to run new wires, which is an absolute pain on these cars.

If you want to do rear speakers let me know, I have a write up as well as brackets & cloth for the storage tray so it looks factory and allows you to use 3 1/2" speakers.