Earthing a sub in the boot

[stu_316i]

Just a quick question..

I will be attempting to wire in a sub to my car tomorrow and was just wondering where the best place to earth the sub too in the boot of an e30 was?

Or if there isnt a best place, just where / what people have used?



Thanks

Stu

[dazleeds]

why would you earth the sub to the car

[tomtomiS]

i ran the earth lead to one of the rear seatbelt anchor points and have had no issues with ground feedback or interferance

[dazleeds]

ahh i get ya

installed 100s of subs in past and never had the need to earth them too body and not had interference

[SHAKEELE30]

must be talking about an amp

[tomtomiS]

i used the biggest ring terminal i could get my hands on but still had to chop a bit out so it would fit round the seatbelt anchor bolt

[dazleeds]

must be talking about an amp

makes a lot more sense

[stu_316i]

Thanks for the quick feedback, I was thinking about using a seatbelt anchor.


@dazleeds

Well, its not really earthing the sub, as much as the amp which is part of the sub (active sub package thing) sorry if thats whats got you confused. It needs an earth, and I guess its better than running 2 cables back to the battery I could be wrong though! Its just what ive been told to do!


Thanks

Stu

[dazleeds]

Thanks for the quick feedback, I was thinking about using a seatbelt anchor.


@dazleeds

Well, its not really earthing the sub, as much as the amp which is part of the sub (active sub package thing) sorry if thats whats got you confused. It needs an earth, and I guess its better than running 2 cables back to the battery I could be wrong though! Its just what ive been told to do!


Thanks

Stu

yeh thats right deffo earth the amp

seatbelt or rear strut top bolt should work fine

do the 4 pots have a rear earth point where the 6 pots have the battery still?

[Alex]

i used an earth near the seat belt mounting points in the cabin

[tomtomiS]

Thanks for the quick feedback, I was thinking about using a seatbelt anchor.


@dazleeds

Well, its not really earthing the sub, as much as the amp which is part of the sub (active sub package thing) sorry if thats whats got you confused. It needs an earth, and I guess its better than running 2 cables back to the battery I could be wrong though! Its just what ive been told to do!


Thanks

Stu

yeh thats right deffo earth the amp

seatbelt or rear strut top bolt should work fine

do the 4 pots have a rear earth point where the 6 pots have the battery still?

im intrigued, a factory earth point would be marvelous, gonna be doing the ice install next week and a manly earth point would be very handy , if my iS has such a thing?!

[dazleeds]

driver side rear behind the back light is where a 325 has its battery

check behind the carpet and in the storage compartment

[stu_316i]

I dont know of one, was having a look round the boot for one this evening. I thought maybe where the lights were earthed to, but couldnt find one for them.

Strut top bolt is a good idea though, I hadnt thought about that.

[dazleeds]

heres another one

the jack bracket is welded to body too

[tomtomiS]

I dont know of one, was having a look round the boot for one this evening. I thought maybe where the lights were earthed to, but couldnt find one for them.

Strut top bolt is a good idea though, I hadnt thought about that.

IMO the seatbelt point would be better as there's more metal to earth into

[stu_316i]

You are probably right, would just be nice to have the earth in the boot. I will have a look tomorrow morning when im attempting to install the sub .

I will probably start a thread tomorrow about my complete budget, but (I think) quite nice little set up.

[tomtomiS]

You are probably right, would just be nice to have the earth in the boot. I will have a look tomorrow morning when im attempting to install the sub .

I will probably start a thread tomorrow about my complete budget, but (I think) quite nice little set up.

you should only need an extra 50cm of cable of route it into the passenger compartment for that, tho the rear battery earth would be much better and need less cable too, will have a look tomorrow

[sati]

i earthed mine to back of the seat's , just sanded the paint off and used nut and bolt , was sound never had any issuse's with it.

[hongkongfuey]

self tapper into fresh metal, shortest wire possible