Darn...

[Lspade 10+ year member]

Ok, so I finally got most of my system in. The only thing I had left to do was wait for my sub to arrive and build the box for it. I got to listen to my new kicker components for the first time and I was amazed (compared to my stock speakers). But then I revved up the engine to go drive around and noticed a high pitched whine. Well, I never dealt with this problem before but I did have a ground loop isolator in my pile of car audio junk in the garage. I plug it up and the noise was gone but then I got tons of snapping and crackling out of the speakers. I disconnected the isolator and now I get a random popping noise every 5-6 seconds //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif. Whats goin on?????

I think the wine only comes from the right speaker (it sounds like I have a quiet/high-pitched turbo charger) when I revv the engin but the crackling comes from both. Will this whine harm my speakers? Because it is unnoticable unless I have the volume off so I could deal with it unless it will ruin my speakers.

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[LeX 10+ year member]

it shouldn't damage your speakers its just interference but its a pain in the *** so check all your grounds... unless you want the ladies to think you have a supercharger ( lol)

 

[Lspade 10+ year member]

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif. So what exactly do I check for on my grounds?

 

[LeX 10+ year member]

make sure they are on bare metal. did you sand the area around where you grounded the HU and the amp(s)?

 

[Lspade 10+ year member]

I have it grounded to the battery (amp to 4 gauge to distribution block to 0 gauge to negative terminal on the battery) I just bought this car and threw in the positive wire then realized I had enough to reach the battery with the negative so I did because the body looked like a crappy place to ground too.

 

[jnralp00 10+ year member]

Try grounding closer to the amp.

 

[Lspade 10+ year member]

I don't get why that helps? I know an spl dude that has 3 runs of zero gauge to the battery for his ground. Then those lead to a bus bar which goes to his amp. This just means less voltage drop am I right? So if I take out my ground and hook it too the metal right next to my amp, how will that help? It doesn't make sense //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif? How does having a long ground make my speakers "whine"?

 

[Lspade 10+ year member]

I just rechecked my loop isolator.

If the car is off there is no whine.

With isolator, if the car is off there is no whine.

If the car is on the tweeters whine.

With isolator, if the car is on there are snapping and crackling noises.

Do you guys think a new isolator would help? And could someone answer the questions in my last post, I fully do not understand it.

Thanks

 

[phantom240 5,000+ posts]

No. Try a different ground location like suggested before.

 

[mannyb18b]

Try short as possible ground, and make sure your RCA's are not near your power wire.

 

[LinxuS 10+ year member]

Did you guys not read what he said?

I have it grounded to the battery (amp to 4 gauge to distribution block to 0 gauge to negative terminal on the battery) I just bought this car and threw in the positive wire then realized I had enough to reach the battery with the negative so I did because the body looked like a crappy place to ground too.

The amps connected directly to the battery..

Did you run your RCAs next to any power wires?

 

[phantom240 5,000+ posts]

I ran mine next to my power wire and had no problems... not to say thats the RIGHT way to do things... But in my particular case it didnt matter.

 

[chucku 10+ year member]

You shouldnt need a loop isolator! WTF is that? Just check and ground everything right. Try grounding the rca cables. Ive only gotten noise problems when I didnt install something right. Run the power cables away from signal cables. That should be common knowledge. Youll figure it out.//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[enzowho 10+ year member]

Copper wire has some inherent resistance. This resistance is based upon (among other factors) the wire's length. So, when you run a super long ground cable you have a voltage drop across your ground wire. This means your amplifier/components don't actually set at zero volts. So, if you run a short ground wire for your H/U and a long wire for your amps there will be a systematic offset induced on your components.

When you have a voltage offset like this, it allows noise to be induced in your system. So, by reducing your ground length you will decrease the possibility of this noise being outputted to your speakers.

 

[Lspade 10+ year member]

Holy crap man, you sound like a genius. So if you say it would help to make my ground shorter, could I go the opposite way and make my head unit's ground longer?

Also, when I hook up my subwoofer amplifier I assume the same thing is going to happen to my sub? Will this harm my sub in any way or will it just be a noise that gets anoying?

EDIT: Forgot to mention that my power cables are ran underneath the car and my rca's are ran inside through the panels so I think they are far enough away.