i've done it, and it took me literally minutes. it made a huge difference in bass response, since it ports the trunk to the cab, which is SUPER SOUND DEADENED otherwise.
i posted it on club202.com...here it is
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I just took out the rear deck speakers in my car and DAMN! The bass is literally 3-5x louder in the cab. I can actually hear the subs now!!!! (Although I just put my system in less than 24 hours ago. I searched around and everyone was saying to remove the rear deck, which requires taking out the seats, the c pillars, headrests, etc. A few people said to just take the grilles off, and take it out that way. Without any good instruction, i gave it a go and it was pretty simple...here are a few notes.
**Doing it this way is a TON less work. It took me about 30 minutes start to finish
1) With headrests UP, pop grilles off with flathead screwdriver. Might take a little convincing, just insert and twist being careful not to damage the grill or the deck upholstrey
2) With the headrests DOWN, remove the 4 screws in each "corner" of the speaker. You can see them from the outside. It's a torx screw, but you'll have a hard time fitting a torx driver in there. I used a small "L" shaped allen, 7/64, fits perfect.
3) Separate the upper grille from the speaker, and slide inwards (towards the center of the deck) and out.
4) From the trunk, remove the "bill" from the speaker basket. You can stick your fingers in the holes in the bottom and feel a tab that you push down. If that doesn't work, try up. But i think it's down. The "bill" should now come off.
5) Still from the trunk, you'll see 2 black plastic tabs that hold the speaker/basket in. They are located on the side of the speaker closest to the rear seatback. Push them in and you should be able to pop the speaker up with no problems
6) From the inside, remove the harness from the clip (where the wires attach to the basket) and from there, you can dissasemble the connector to disconnect the speaker from the wiring. I chose to disconnect form the speaker side, so the wiring left in the trunk/deck has a harness- and no exposed wiring. Then i tucked them in wherever i could that wouldn't make a rattle.
Turned on the car, double checked my eq settings, popped in some st. lunatics and cranked the motherfucker up.
DAMN!!!!
Now i've got to pad my rear liscence plate and tighten the trunk latch to clear up the rattling.
DAMN!!!! The difference is night and day.
Not bad, considering i've had the car 1 week today