Wiring up a car sound system at home

[NovaBoi92]

I feel like doing this i know it is possible, im pretty confident in doing it. But there's a few things im not sure about.

If the head unit can be wired up and all working correctly, im good to go from there with wiring up speakers and amp etc.... now i know what all the wires do for the connections on the unit. Obviously, Live would wire straight to the live terminal on the battery, and earthing to the earth on the battery.

1. what would i wire the ignition wire to, and the other wire that dims the display when the you turn the headlights on?

2. What could i use to earth the battery out to? anything at all metal?

Thanks for the help

[AlexW]

What are you going to use to power it?

[AlexW]

But if you run it off a car battery you put the earths straight onto the battery, the earth strap from the battery to the metal is so it makes a circuit, if you earthed it onto a bit of metal it wouldnt make a circuit.

Ign live you would have to put onto the positive on the batter, put it thought a switch though. Oh and fuse it all.

[NovaBoi92]

yeah i know that bit, the earth from head unit to battery earth, so just earth the battery to any metal surface yeah? ok cheers, and which wires do i fuse? The Permanent live, and what else?

[AlexW]

wtf what did i just say. Dont earth the battery to anything! It wont work!

Fuse both the lives. although your head unit prob has one on the back.

[NovaBoi92]

sorry didnt know what you meant, why wont it work if i earth the battery? so i just earth the head unit, but not to the battery

[Spudly]

Are you fitting this in your home or your car?

[mikey14sr]

Did this eons ago (1997!) with kenwood krc-151 and a pair of 6.5"s.

The earth from the head unit goes direct to the battery, that's it.

main power and ign power go direct to the battery too, with a fuse in each one.

Other than the speakers and an aerial, thats all the wiring needed.

I'd recommend using a gel-type battery though, as the normal ones tend to give off harmfull fumes.

[NovaBoi92]

im fitting it in my home, and thanks mikey14sr. going to do it tomorrow, ill let you all know how it goes

[novaxe235]

have u got a scalextrics if you have dont use a battery use the power pack of the scalextrics there usually 240v in 12v out .much easier and better imo.