'Rules' for connecting 2 amps? & Another query

[GinG]

Morning all,

Just wondering, currently in my car I only have 1 amp running, however my plan is that i have my other amp that is sat under my bed to be connected up also.

I plan on having 1 amp running my sub, and 1 running 4 speakers in the car.

My question is: When connecting the second amp, can i just connect power leads to the existing amp or do i need to run a totally new set of cables through the car?

Also i am getting quite a lot of 'white noise' when there is no music coming though. Is this something to do with a bad earth?

Thanks

Edit: Just to add, i have power and speaker wires running 2 different sides of the car.

 

[GinG]

Why two? is one not loud enough?[/QU

Why not? Its just sat under my bed doing nothing!

Negative is connected to the chassis, so not ran it to the battery!

Just cracking on with my carpc so please keep to the topic in mind, how would i connect?

Thanks

 

[GinG]

I guess I was trying to ask is it going to be a throbbing chav wagon or something with some taste?

Sorry, no its not going to be a banging chav wagon, I am building a carpc in my car, will have photos of progress later on, assure you its not a chav wagin though

 

[GinG]

oh noes! ^^!