Where has everyone grounded their amp in the boot?

I'm thinking of using one of the existing holes when you pull the carpet off towards teh back seat. Sand, nut and bolt.

Best way to do it, just make sure you dont use one that has been screwed into plastic.
On mine Ive used existing grounding points in the boot.

There's also a mysterious bolt on either side of the car. They're behind the wheel wells. Pull back the carpet on each side and you'll see them. The advantage of these ones are that you can hide your amp wiring with ease - plus it's right behind where I've mounted my amps.

Just find the closest screw (into metal) to where you're mounting your amp, and yeah, make sure to sand it back.

Ok, grounded to the hole that you can see on the right hand side when you take the seat backpanel off and the carpet on the RHS. Had to drill it a bit larger to fit my bolt. it'll do for now, until I make the false floor, looks like I'll have to drill a hole in the wheel well for a ground at that point.

When we did Owen's car yesterday we just used a screw on the antenna bracket...

Screw or a bolt?

If its a screw - re-do it with a bolt and (I personally, use split a split washer, or lock nut, or nut with the flat wide edge)

Screw or a bolt?

If its a screw - re-do it with a bolt and (I personally, use split a split washer, or lock nut, or nut with the flat wide edge)
Screw, on a metal bracket, which is screwing in to metal... Lots of metal there :) A bolt would stick up a little and look odd in the carpet wouldnt it?

We cranked it, no problems cutting out - Response 4x100w RMS amp too...

Each to their own.

I never use a screw, screws come undone. Bad earth = problems.

If you're talking about the antena bracket, there's atleast 2 bolts that can be used as earth points there, from memory 1 holds the antena, and 1 might be spare (not quite sure, been 6 months since I looked).

Just use one of the bolts, scrape back the paint with some sand paper.

Each to their own.

I never use a screw, screws come undone. Bad earth = problems.

Flat headed screw with carpet over will never come undone.....(depending on sizing)

bolts come undone as well. With striaght edges i'd say it come undone more easilier than any circular flat headed screw would. Screw much better as striaght edges on bolt could smooth out after constant use and there is nothing worst than trying to get a rounded of bolt out.

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Run earth to the bolt where you bolt the top piece of the chair down.

In 6 years of auto electrical work, I've never seen a bolt come 'loose'

Cant say the same for screws, especially self tappers which seem to be a favourite in car audio installs.

Bolt edges only round due to:

Over tightening
Poor quality/improper tools being used.

You can quite confidently torque a bolt, a screw that holds on by a couple of threads you cant.
As for bolts coming loose - it depends on what type of bolt you use compared to the application. The chances of a bolt coming loose with no load on it is rather slim.

Screws come loose due to vibrations, bolts, especially when used with split washers - is rather rare.

As I said each to their own.

:stoopid:
In 6 years of auto electrical work, I've never seen a bolt come 'loose'

Cant say the same for screws, especially self tappers which seem to be a favourite in car audio installs.

Bolt edges only round due to:

Over tightening
Poor quality/improper tools being used.

You can quite confidently torque a bolt, a screw that holds on by a couple of threads you cant.
As for bolts coming loose - it depends on what type of bolt you use compared to the application. The chances of a bolt coming loose with no load on it is rather slim.

Screws come loose due to vibrations, bolts, especially when used with split washers - is rather rare.

As I said each to their own.

I used a nut and bolt w/ washers, had to use another nut to raise the ring terminal as it was too large to sit flush.