30MilesOffshore

I'm looking to lay some wire down this week and wanted to see where everyone is using as their amp grounding point in the C6 Coupe?

I plan to mount the amp either in one of the cubby holes in the rear or along the back of the car between the two storage compartments. The shorter I can keep the wire, the better.

I've ran a search on the forum and have come up with:
1) Seat Post
2) B-Pillar
3) Drill hole through cubby hole & tap into frame

Those spots seem great, but I'm just trying to brain storm and see what other spots you guys have used? Thanks!

Shangreer

My installer did a single ground back to the battery with a distribution box just behind the passenger seat and grounded everything, include the head unit to that block.

Shan

Jimmy 2 Times

uh, the ground should be as close to the amp as possible. MECP handbook states it should be no longer than 18 inches. You may want to have it re-grounded. an amp in the hatch to the batter is way too long

Shangreer

I understand the goal is a shorter ground but, having had two of these installed before, the grounds have always been a PITA. Running it back to battery works great as long as you use a large enough wire. My install is testimony to that fact. I have no noise in the line, no issues with dimming lights, etc.

BTW, the installer grounded back to the battery at my request.

Shan

Jimmy 2 Times

just becuase it "works" does not mean that it is correct or safe

Shangreer

Agreed, so what are the downsides? If it does not affect sound, what is the negative effect?

Shan

Spkrboy

Assuming the factory ground wire to the battery was improved, the difference between running a large wire all the way back to the battery and using the vehicle as a ground path is in the aggravation of running the wire and the additional expense of doing it. Doing so is certainly not unsafe by any stretch.

It's true that the vehicle's body is more than sufficient in most cases, but electrical resistance is the final arbiter, not MECP.

Shangreer

Thanks Spkrboy, that is what I thought.

_Nomad_

I ran my 4-gauge ground back to the battery too. I have a ground distro block behind the passenger seat that everything is grounded to along with my amp. Perfect set-up and no drilling required.

30MilesOffshore

I ended up using a factory ground spot on the B-pillar. It is right behind the passenger seat about 1.5 ft from the bottom. I unbolted it, sanded the paint down to have a clean connection. I hooked up my amp there and also ran a ground distribution block up to the dash from there. That way I could use the block to ground my headunit, radar, etc.

Thanks for everyone's help!!