Stereo Noise

[the_first_male_lesbian]

I know this is probably a tad amature but ever since I've put a stereo (head unit, amp, sub and speakers) in my girlfriends civic there is this buzzing sound that comes through the speakers in tune with how the car is revving. How do I fix this? Is it just the emf from the battery cable interfering with the other cables?

Thanks

http://www.ae86drivingclub.com.au/forums/emoticons/ph34r.gif

[Oly AE86]

You can buy noise filters that go inline with the amp/stereo cables, reduces noise created by altenators, coils etc.

Most car sound places should have them. Jaycar also has a few - http://www.jaycar.com.au/productView.asp?I...mp;SUBCATID=563 (http://www.jaycar.com.au/productView.asp?ID=AA3076&CATID=24&keywords=&SPECIAL=&form=CAT&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=563)

[Jason]

you have to many ground loops in you wiring picking up on the noise. Jaycar even has a guide to avoid noise somewere

[Gilly]

noise filter thingy

had to put one in my old gemini, when i installed a cd player.

i thought it was a massive gimmick, but it worked

[ke70dave]

is the buzzing noise coming out of the speakers that are connected to the amp?

an easy way to test for ground loops is to get a peice of wire and put it between the outside of the RCA lead (just squish it in there somewhere) and put it to ground

[ru486]

Or you can leave it and pretend you have a turbo!!!

In addition to the ground loops, make sure your speaker/signal wires do not run parallel to any other wiring, especially the amp power wire (if you have one). Most common rule is to run speaker wires down one side of the car, power wires down the other side.

[HYPNTK]

its the earth...ITS THE EARTH WIRE I TELLS YA!!!!

try putting the earth (ground) wire on whatever you have i.e headunit, amps etc. somewhere else (better maybe)

its always the friggen earth wire...if that fails then try the noise filter, in most cases they work but you shouldn't need them if you get good EARTH http://www.ae86drivingclub.com.au/forums/emoticons/blink.gif http://www.ae86drivingclub.com.au/forums/emoticons/blink.gif

[steroidchickens]

make sure the RCA cables do not cross the power wire at all.
other wise wrap the rca cables in alluminium foil. trust me it works.

in my experience with noise supressers they dont work at all.
just go over the installation and make sure the rca cables are seperate

[NickAE86]

inductance is bad mmmkay.

segregate the speaker wires from power, check your earths & check the speakers are wired correctly....they usually arent polarity conscious but should be connected in a like manner

also what speakers are you usuing and what size cable?

[Jason]

"its the earth...ITS THE EARTH WIRE I TELLS YA!!!!

try putting the earth (ground) wire on whatever you have i.e headunit, amps etc. somewhere else (better maybe)

its always the friggen earth wire...if that fails then try the noise filter, in most cases they work but you shouldn't need them if you get good EARTH"


thats not true ground loops are exctly that, a loop of a ground wire, this acts as a crude antanna. Adding another earth will probly not solve noise issues

when you playing around with high power high frequancy stuff you quicly learn how bad inductance and coupling is http://www.ae86drivingclub.com.au/forums/emoticons/tongue.gif

[HYPNTK]

i never said to "add" another ground wire...i said to try grounding it somewhere better...and also what steroid chickens and nickae86 said are very good things to check as well as noise filters are for people who just give up trying to find the problem...and the problem 90% of the time is the earth wire is acting up either because its not grounding well or its getting affected by something near it etc.

[steroidchickens]

this thread has gone crazy with different answers.
it can only be 2 things,
-Bad earth
-rca cables crossing power cable.

or maybe faulty equitment.

[ke70dave]

this thread has gone crazy with different answers.
it can only be 2 things,
-Bad earth
-rca cables crossing power cable.

or maybe faulty equitment.[/b]


man thats 3 things!! http://www.ae86drivingclub.com.au/forums/emoticons/tongue.gif

yeah check those THREE things out, its all it can be http://www.ae86drivingclub.com.au/forums/emoticons/2thumbs.gif

my headunit is actualyl damaged somehow, and i have to ground my rca's to stop the buzz, but its been like that for a few years now, no buzz!

[callum1]

if i were you dude id go ask gold coast car sound. they could tell u in a second for free. and you wouldnt have to sift through all these diffrent opinions.

[NickAE86]

^ wheres the fun in that. They wont fix it for free...besides understanding why it doesnt work enables you to fix it....your problem can be solved in under 5 min with a multimeter & shielding (eg foil)

[the_first_male_lesbian]

I put all the opinions together and it seems to have worked http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif There wasn't enough length of cable to not have the rca's cross over the power cable but where they did cross the cables are wrapped in foil and tape and ive put them at right anlges. I also re-did the amps earth.

Thanks alot for your help guys http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif now my problem is that one of my friends mucked around behind the head unit and the left front speak doesn't sound anymore, damm fool! I'll just go over the connections on the weekend