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What is the best way to mount these? I was thinking the amp on the back of the seat, but the holes don't line up with the studs. I was then thinking about the amp on the trunk floor, but i don't know if the sub should be in front of behind the amp. Then I was thinking about the amp on the sub box, but I was thinking that was ghetto. What to do?

Also, where do I insert the amp wire from the battery into the car? I have not looked much, but it seems to be hard to find. I have finally ordered the Metra piece for the head unit and I and finally ready to do this. What about the grounding also?