Hey, I was curious where the 4th gen folks have their amps grounded. (yes, I know, not audio forum, but it is car specific) I just put in a speaker amp a while ago and found out that my spot of choice wasn't good enough. I'm using that random screw that jutts up right behind the screws of the rear strut tower. I looked under the car and found what it goes to (and forgot obviously) and I remember it being a suspension component, so it's got a lot of metal to ground out to, and I sanded all around the area, but it's still just crappy enough to cause radio noise. I got the connector layed flat enough to get it almost all the way gone, but there's still just enough that it's not perfect. Anyone got a better spot? I'd drill in somewhere, but it seems like almost everything in the trunk is just thick sheet metal, no chassis.

 

what about under the spare tire? good place to sand and put a screw right into the metal...?