Question In car entertainment - wiring and interference?

[Jupitus]

Folks - if I were to wire normal car speakers using normal leads, which were routed to the rear of the car alongside the wiring for lights etc would you expect interference on the speakers? Do I need to route separately, or use shielded cable?

Thoughts/ideas/suggestions please!

Jup.

 

[Cadelin]

Its a direct current that powers your lights. You won't get intereference (called crosstalk) between that and the audio signal. (Unless you like sitting there flicking your lights on an off 50+ times per second!)

I can't see any obvious reason that the wiring of a sound system inside a car would be any different from what you would do in a room but I am certainly not an expert.

 

[Morphius]

when I did mine I was always told to do it on the opposite side to any original wiring running down my car. Have the power cable running to your amps down the opposite side to the sound cables, I think this is what is likely to cause interference if it occurs? not sure though, I merely wired all mine up so sound cables were on one side, power was on the other and I didn't have interference.

 

[Cadelin]

when I did mine I was always told to do it on the opposite side to any original wiring running down my car. Have the power cable running to your amps down the opposite side to the sound cables, I think this is what is likely to cause interference if it occurs? not sure though, I merely wired all mine up so sound cables were on one side, power was on the other and I didn't have interference.

That sounds like a good suggestion but for practical reasons. If you screw up or if in future you need to go back and fiddle around with the sound you won't confuse the wires for lights etc with the sound ones.

As I said before you can't get interference from a DC current. For you to get any interference you need a changing magnetic field, which requires an AC current.

 

[Jupitus]

Yeah - Ive asked elsewhere too and found the same - that's a question of the power to any amp being separated - the speakers are fine going alongside 12v DC lines.... thanks for the help