i recently took my bose system out and replaced all the speakers with pioneer and kenwood. but now i have this turbo-sound coming from my speakers as i accelerate. very annoying and distorting the music. someone told me it could be misplacement of the ground.

anyone else have this problem and how did you fix it? thanks.

 

Yes it is a misplacement of the ground.

 

i had that problem when i had a cheap sony headunit with one RCA outputs running 3 amps. After i got a Pioneer headunit with 3 sets of RCA outputs, one of them being for the sub, and upgrading my RCA wires,the speaker whine went away. I do have something of a tape hiss though when no music is playing like in between tracks but i am so glad to have gotten rid of that whine. but, i'm guessing that you don't have any amps so i would have to say bad ground too.

 

dont run the power wire on the same side of the vehicle as your rca's

 

i got pioneer DEH-P860MP which has all the rca outlets. also got 2 amps and an alpine eq. the place i got it installed gave me these 2 filters but all it did is make the music sound mono and the whining was stll there.

definately gonna check the ground and if necessary, change the wiring. thanks for the tips!

 

yeah, usually with these newer pioneers you don't need the filters because they have them built into the headunit.

 

that was very thoughtful of them

 

why yes it was

 

like others said...check your ground and see if it's making good contact with the car. if there's paint where the ground is, sand it off so it'll make better metal to metal contact.

 

This is only a myth.....

--Don

 

Don - I will be researching that claim. Any good installer book, or intelligent installer will tell you to run power separate from RCA's.


Browne-

To help you troubleshoot go here: http://www.teamrocs.com/technical/pages/noise.htm don't miss the tech paper on "Bad Grounds" linked in the paper if you think that's likely your problem.

ANYTHING can make you have engine noise, however 90% of the time, it has to do with grounding. Re-ground your battery with thicker wire (I used 1/0 from home depot) and find a common, clean ground in your trunk for the amps. If it's not clean already, ground it down with a rotary tool or sandpaper to clean metal. Use the same guage or thicker guage than your power wire. Keep your ground cable as short as possible.

Good luck.

 

Actually theres a ton of info on this. Its just about finding it...

I do in fact take offense to the fact that you say "Any good installer" will tell you this, as Ive been doing this for 17 years. I tend to think of myself as "good" or "intelligent".

To simplify..Power is a continuous circuit as you know. From battery to amp to ground to battery. One large loop. What is the common of all? Ground. Your chassis is one large ground, therefore whether next to, or on the opposite side, your RCAs are still laying right next to or along with the ground/power. It is really simple actually.

I do typically still run seperate, because thats how I was first tought in the 80s. But really it isnt needed. Theres many people/shops that install without seperating and have zero issues.

--Don

 

running power and rca signals together cannot induce noise since power is not a time-varying signal and cannot distort the audio signal. only ac signals can distort ac signals. by distort i mean induce noise.

 

That is a myth - not an issue in the DC world

 

installer book? like the MECP book? lol that's not exactly a technical manual on the subject of signal distortion. any good installer will tell anyone what they have been doing for years. does that make them an expert on WHY things are done? not at all. an installer cant tell you why wires are run that way unless he is an engineer.

 

i had the rcas and power run on the same side of the car in an old vehicle of mine, and i had horrible engine noise. i then put them on seperate sides, and the noise went down considerably

 

ehh...i'm running all my wires on one side of the car and have ZERO noise. i just made sure my grounds were secure and making good contact with the frame of the car.

 

then your RCA's must have been next to some other source of noise behind the dash (there are many on the drivers side)

 

all 1000000 of my wires on the leftside of the car, sounds great to me though.

 

that is a lot of wires

 

Typically what can be a major cause would be the ECU which is unfortunately located below the radio in Maximas....

--Don

 

i had crazy @ss beyond belief engine noise like worse than any of you have ever heard i bet. it wasn't just engine noise, it was LOUD and ear piercing. and what's funny is it wasnt like i received a bad product to begin with,e verything was installed fine and worked fine for a couple months and bam, speakers blew crazy whine (gains were set fine thank you much). anyway i thought it was the grounds, redid the amp, still there, reran wires, still there, redid ground on the h/u, still there, tossed the h/u, got an alpine...disappeared

oh and i sold the amp to someone i thought was a sucker, they say they love the amp lol

 

thanks for the help!!!

actually, when i first installed my system the niose was very low. but one day after my battery died, the noise factor increased 10x. my engine is also making the whining/turbo sound noise.

currently, im blasting my music so i wont have to hear the noise.

 

it was a kenwood h/u btw that was causing my troubles. i'm guessing a bad internal ground or something

 

Yea, it is VERY common of Kenwood HUs to give noise issues.

--Don

 

Many times, an additional ground on the HU can eliminate all those issues. My wife's Kenwood in her Jetta treated me very well. I'm surprised to hear of the issues.

roofadoofalus - if separating the power from the RCA's only lessened the noise, then clearly this was not the root problem. It was only worsening another, existing issue. (Maybe this is why the rule of thumb is to separate power from audio signal? It can potentially worsen existing issues?) Many things can compound noise, but it's important to isolate the source of the whine. If it's not a bad amp ground, re-ground the headunit and if that doesn't work, you may have a single bad component creating noise. For instance, in my experience, Audiocontrol's delicate electronics are also notorious for inducing noise when they are mistreated.

 

Ok...if you hear the engine noise coming from the speakers (gets louder as you use ac, headlights, windows....anything that takes power) here is what it could be....

1. Check your OEM condenser in your engine, it should be connected somewhere on the positive(+) either coming from the battery or the coils ... not sure...should ask a pro. electrician...if it is damaged nothing else would help and you need to replace it. If it's not it...move on....

2. You should buy a noise filter and begin testing it on the following
a. The positive(+) power wire going to your head unit, or...
b. The amp...basically whatever is powering your speakers. But check both just in case, you might need 2 for both of them.

*Careful not to connect the noise filter to the positive on the battery, you'll burn it out.

I had the engine noise, and installing the noise filter on the positive(+) lead going to my amp fixed the issue.

Also if non of the above helps then it could be your alternator.
Have all this checked out by an electrician you trust.