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iTrader: (5)

things i see is the size of gauge wire so i need to ask ( how long are they ?)
have you done the big 3 ?

i would run a 0 wire form your battery neg to stock frame and form frame to the alt bace
also look at your battery for the white crape that sometimes gets on the post
also are your caps on the battery or have thay starred to come off ?

The Grinch

My guess is your noise is coming from the head unit. You could probably add a ground wire to the RCA connector's ground as someone suggested. But I suspect that using a nice short ground wire (<18") from the HU, not the RCAs, to bare metal will also do the trick. Grounding from the factory wiring harness should be avoided.

Come to think of it, a little more information about your head unit would be helpful.

macguyver

The ground from your battery to chassis should be as big (at bare minimum) as your largest power positive wire running to your system. Too many times I've seen guys run 1/0 to the trunk to a system, use a 1/0 chassis ground, but leave the stock #10 or #8 chassis wire.

Electrons flow along a path of least resistance, always, no exceptions. If your alternator is bonded to you vehicle's chassis with a #4 or larger wire, but your battery is bonded with a #10 or #8, guess where your amps are going to draw their current from first? It's not the battery. And the battery's job of filtering any AC ripple is going to be negligable, so your amps will see alot of what the alternator produces. And it's engine-whine-city folks.

so, ensure you don't have any ground loops for at the amps themselves, never attach the metallic chassis of an amp to the vehicle's chassis. Set your gains to minimum, and (if you have quality gear) your noise should be gone.

icdbko32

always ground in the same spot, so if you have 2 amps ground both of them in the same spot. not sure if that has been said or not or if you already knew that.

The Grinch

Since I just happened to be surfing Crutchfield, have a look at these articles:

Noise Suppression Guide
Amplifiers: How to Suppress Noise

danyman

iTrader: (1)

how do you ground 2amps that are 10ft from each other????? try new rca. ground your deck and reground the body of the car

macguyver

Run all your amp grounds to a common ground point via a ground block. You can do the same thing with your deck, and can even go 1 step further and isolate the deck's chassis from any bonded steel in the vehicle. Sometimes it's tricky, but can be done.

danyman

iTrader: (1)

ya but i thought shorter the ground the better??? unless i misread something somewhere. right now my deck is grounded seperate from my 4channel amp( has its own ground also) and my mono amp that also has its own ground.

and i have no noise issues even with 3 different ground points

macguyver

Not every one will have noise all the time, but when it does present itself, sometimes it can be tricky to identify the cause.

And define short ground. An amp that has 15 feet of power wire must return that current to the source (battery, alternator) via the car's chassis. This distance can be as long as the power wire itself. And nobody says you can't run a ground wire for your system along with the power wire all the way to the battery. Many old-timers swear by this approach in high-end systems, but it doubles your power wiring costs.

I did this with 1/0 cable in my last car. I had no system noise whatsoever, not even a bit of hiss.

dan_seguin90

k so i got like 99.9999 % of it away. its ever so slight even when my gains are turned way past where i listen. but its there in the tinnyesst when no sound coming out.

for all those with the same problem as me this is what i did.

did not change the 0 gauge setup.

took one of the four gauge grounds and put it with the 0 gauge ground on the right side of car. took the other and put it on the left side of car. then rand a four gauge groun from my distro to the battery grounding post. THIS helped tremendously.

i then grounded my dual gorunded my decks from the deck chasiss' and the harness ground and put those to the chassiss of the car. not the stock ground.

i then grounded my rcas to the chassis of the car. (same gorund as the deck) even closer.

i then grounded my rca to the chassis of the deck in the same place i ground the deck chassis to to car chasis. ( no i cannolt take the rca>chassis ground away or the noise comes back.)

o i also put material underneath my rcas since they were on body metal didnt really do anything but i did everything i could think of. (well other then just throw it out LOL)

and this brought me to the most slight noise that is not noticable.

but obv i hate it because i know its therel.

anybody have any other ideas while my car is still in pieces.