Ground locations for amp install 2013 si coupe

xXCiviXx

Well-Known Member
890
657
Calgary, AB, Canada
Vehicle Model
Si
Body Style
Coupe
I used one of the taillight bolts as a ground until I moved my amp and it worked fine. I also used hi level inputs from stock sub and tapped the + and - right at the sub and connected the L and R hi level to the sub output. I have no problem with noise and it is plenty loud. Did you tune your amp? Adjust the gain and this could help.
 

xXCiviXx

Well-Known Member
890
657
Calgary, AB, Canada
Vehicle Model
Si
Body Style
Coupe
I ended using the bolt under the seat. You have to remove the small bit of moulding, but then it works great. I actually drilled a perfect size hole in the moulding to prevent the wire from getting crushed.
could you take a pic showing the location where you grounded the amp? I am planning on installing my new amp under the passenger seat
 

Metal85

Member
45
19
FL
Vehicle Model
Si
Body Style
Sedan
cuvuc.jpg

Under the carpet here, about 4 inches past the top, a tiny bit more to the left, cant miss it, there are a ton of negatives going to this location
 
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