Musicar NW trunk sub installed

biggripper · 01-08-2021, 10:54 AM

Quote:

Originally Posted by jello

Hey OP. May i ask where you grounded the amp in the trunk? Did you make a new hole somewhere or you used a current one? If so, which one did you use?

I can't remember for sure since I no longer have the car but I believe I ran my ground to the the grounding wire attached to the body near where the battery is. If you pull the right side trim you should find the battery and f4om the battery negai terminal you see a brown ground wire that attaches to the body. I believe I just attached to that bolt. I don't recall needing to drill any holes.

Pottah · 01-08-2021, 12:19 PM

Quote:

Originally Posted by jello

Hey OP. May i ask where you grounded the amp in the trunk? Did you make a new hole somewhere or you used a current one? If so, which one did you use?

I used this screw. I sanded it down to bare metal first, obv.

jello · 01-08-2021, 12:26 PM

Quote:

Originally Posted by biggripper

Quote:

Originally Posted by jello

Hey OP. May i ask where you grounded the amp in the trunk? Did you make a new hole somewhere or you used a current one? If so, which one did you use?

I can't remember for sure since I no longer have the car but I believe I ran my ground to the the grounding wire attached to the body near where the battery is. If you pull the right side trim you should find the battery and f4om the battery negai terminal you see a brown ground wire that attaches to the body. I believe I just attached to that bolt. I don't recall needing to drill any holes.

this is what i thought it as well but read somewhere that it's not recommended due to the IBS and affecting the battery load... but i'm unsure if they meant attaching it directly to the negative battery terminal that's frowned upon.

jello · 01-08-2021, 12:29 PM

Quote:

Originally Posted by Pottah

Quote:

Originally Posted by jello

Hey OP. May i ask where you grounded the amp in the trunk? Did you make a new hole somewhere or you used a current one? If so, which one did you use?

I used this screw. I sanded it down to bare metal first, obv.

this really looks good sir but i'm placing my amp on the lower left side (where my oem amp is at) and i don't think it would be wise to wire it up on that top location.

RocketBoots · 01-08-2021, 01:25 PM

Quote:

Originally Posted by jello

Hey OP. May i ask where you grounded the amp in the trunk? Did you make a new hole somewhere or you used a current one? If so, which one did you use?

There's an OEM grounding location on the top of the tire wheel arch on the body. I've always used that (on multiple BMW's) and it's worked very well. No need to drill/sand/repaint