All I've ever worried about is the RCA's and Power wire. The rca's are what picks up noise

 

so speaker wire crossing power shouldnt be a problem? that would make the install so much easier :laugh: I think im just paranoid.

 

Just use a decent quality wire and you shouldn't have any problems. I've never run into any interference with wires before, only bad RCA's

 

power wire one side, the other side RCA or speaker and down the trany is the speaker wire or RCA's. Just don't mix anything up.

RCA and speaker wire can be mixed but I'm a purist and don't do that

 

Like what everyone says, just try to use a good quality wire with a thick jacket.

 

Everything in this thread so far is wrong. You can run whatever you want, wherever you want. You might have noise problems is certain cars around certain things like fuel pumps, but that's it. Here is nothing wrong with interconnects next to power cables.

 

Everything in this thread so far is wrong. You can run whatever you want, wherever you want. You might have noise problems is certain cars around certain things like fuel pumps, but that's it. There is nothing wrong with interconnects next to power cables.

Contrary to popular opinion, that is actually true most of the time. Occasionally it may help to run signal and power wires apart from each other, but only in specific instances.

 

same here too, i run both power (2 4 gauge + 1 4gauge -) and and rca the same side and theres no noise, maybe its because its a sub amp and u cant hear it from the subs.

 

So how do you avoid crossing the power wire with the left door speaker if the power wire is coming down the driver side? Just put it side by side with the speaker wire on the left of the power wire? Hope this makes sense...

 

That's the point, you don't need to avoid anything.

 

Sorry to dig up an old thread, but I figured it would be better to ask here than start a new one...The power/RCA cable debate makes sense, but what about running power wire next to your speakers? My kickpanels will place the speakers in very close proximity to the 4AWG power wire I am running down the driver's side of the car. Will there be any interference?

 

It should be fine...just test it. You will have everything ripped apart anyways. Give it a quick test and if no interference your good

 

True, but I haven't finalized anything yet, so testing won't come for a little while. Just trying to understand what potential obstacles I may run into and whether or not it will involve me redesigning wiring layout.

 

Pretty sure speaker wire is ok crossing power wire, just try to make it cross at a 90 degree angle the best you can. It will more than likely be ok parallel if you have to.

 

The speaker wire I am not concerned about, but having the power wire running (potentially) next to the tweeter is what I am worried about.

 

You'LL be fine, as long as ur using decent quality stuff...both power wire and tweeter have anough protective material.

 

I hope that is the case. Thank you for all your help!

 

No problem hopefully someone that knows what they are talking about can chime in ha...from my experience eventually some wires have to cross, as long as the rca and power arent close your good.

 

Not really, as long as the wires/cables are from decent brands and build quality up to par...

 

Okay, here's the way this works:

For any "signal crosstalk" to occur between one set of conductors and another (two different source/return paths), there has to be either capacitive or inductive coupling. And the only way to generate capacitance or inductance between these cable pairs is if they route parallel to each other for a significant distance. (All capacitive/inductive coupling behaves via laws of electromagnetic fields - Maxwell's equations.)

For capacitive coupling to have a significant effect, both voltage and frequency have to be very high - that's the way capacitors work. For inductive coupling, the current has to be very high - since this is how inductors work. For car audio systems, voltage is relatively small, and frequencies don't get much above 20kHz (at least for audible affects). Thus, the capacitive effects from cable routing are very minimal.

DC power cable routing might have some influence on line level signal cabling, if there is any AC ripple in the amplifier power supply cabling. But, this can be minimized with proper grounding techniques, which ensure that RCA cable shielding will act to reject any inductive coupling that could occur. And this can be minimized further by maximizing cable separation as much as possible for parallel routing, and crossing cables at 90-degree angles. (Someone's already mentioned this - the coupling doesn't happen at 90-degree crossing angles; this from the way Maxwell's equations are stated.)

Bottom line - this isn't usually a big problem for car audio systems, at least as far as cable routing is concerned. But, noise can be injected into components from AC ripples in the car's DC supply system. This usually happens with lower quality head units, amplifiers, or other components. Rejection of this noise requires either higher quality equipment, or filtering on the DC power inputs. (another topic entirely....)

Hope this helps,
John

 

I've twisted my RCA+Pos+Neg+Rem for better noise rejection

Kelvin