Blumpkin
2 amps, both buzz
heres the dealio, i was hooking up a blue LED to the remote wire of my radio, and i accidently touched it on the body of the car, nd it sparked sub made weird noise and i pulled it off, from then on, my alpine 2 channel, and my monoblock, both buzz, somehow, my amps run, without the earth connected, i run 1 power wire, to the mono block, then from the mono to the alpine, i unplug the ground from the mono to the alpine, and the alpine still runs?? how is it earthed still? and the buzzing is 2 different ones, one with the car off, that when i cover the fan hole on the mono, the fan slows down and the buzzing drops pitch so its buzzing from the fan, and another when i start the car, with the revs of the motor, help
Originally Posted by Swordsy
hey mate, yea i have the same problem, stereo was fine until i put an amp in to run my speakers. since then with accessories its been good, ignition on has been a buzz and when it running it gets interference from the charge rate? as the buzz changes pitch with the revs.
i was told to get a radio interference noise filter so i got one. it says to hook it up to the battery but since i used the original commodore wiring for my stereo i tried the live wire, accessories wire, and the remote wire for my amp with no change, buzz is still there..
What head unit?
If you unplug your RCA's I'd say your Alpine amp will turn off.
Hey mate.
Have you run the RCA and the power wire from the battery together if so this is could be the reason why there is hissing or buzzing coming
from your speakers.
RCA and thick power wires should not be ran together.
Because the thick power wire gives of a magnetic field if the RCAs are exposed to this it will make the hissing noise.
Always run the RCAs on one side and the power wire on the other side.
Also check your earth connections on your amps.
Blumpkin
i have my rca up the left of the bottom of the doors, and my power on the right, and it started after i touched remote wire, did i blow the monblocks filter for the fan maybe??
You got to isolate the problem maybe take the RCAs off from the deck and see if it makes the noise still.
Make sure you got good ground to the body. Run separate grounds from the body to your amps.
And run each amp by it self. and see what happens.
You could of done some damage when shorting the wires.
Hello?
Blumpkin
i dont want it to turn off, im ondering how it runs with no earth, and when i unplug the rca partialy from the mono, so just the bit the goes on the inside of the socket is touching, it stops
Dint understand some of the things on the last post.
But maybe the amp is getting its earth from the body.
Have you bolted down the amp on the body of the car. Some electrical components use this type of technique
to earth the components. But I have never used amp like this before.
Blumpkin
yes i have, its upsidedown on the metal in the boot, near where the boot hinges are, when i take earth wire out, it buzzes ALOT more
Custom Car Stereo Systems
Your amp is earthing one of two ways, the first is through the RCA cables itself, the second is through the chassis of the amp (only applicable if youve got the amp mounted to a metal section of the car).
As StoneX said, what head-unit?
It buzzes alot more because the RCAs are not earthed.
150db in a commodore =
Blumpkin
heres wat i mean, only the middle prong in the amp, so the outside ring of the rca doesnt touch amp, stops the buzzing
Make sure your earth cable is grounded properly.
Were are you getting your earth from?
Make sure its a good connection.
It also could be the deck. I have had poor quality decks come in at work with the same problem.
Blumpkin
and i ahve a pioneer DEH- 2750
I think the outside of the rca is ground and the middle is the positive.
On the RCAs.
Does the other one go in fully.
Make sure there is nothing blocking the RCA going in.
Custom Car Stereo Systems
I would say theres your problem. Remove the head-unit and using a small section of wire touch one end to the chassis of the head-unit and the other end to the metal frame that the head-unit screws to.
You can take this advice or not, dosent worry me.
150db in a commodore =
See, if you'd said that when I first asked, I could have told you that you've probably blown the RCA ground fuse inside the head unit. Pioneer's do this quite often as they have a fuse rather than just plain tracks and it causes the exact problem you have.
People will have a poor ground, the amp grounds through the RCA shielding, RCA ground fuse blows, no ground link between amp and head unit to prevent induced noise, you have noise.
Blumpkin
heres some pics of my amps, my deck, my earthing point, and the pic with 1 amp is the amp that runs without cable plugged in
Blumpkin
its messy because i pretty much checked every wire from start to finish
Blumpkin
how do i change this fuse?
Custom Car Stereo Systems
Its a soldered-in fuse inside the head-unit AFAIK.
An easy way to repair it is to solder a wire from the stereo chassis to the RCA outer-ring. Fixes it.
150db in a commodore =
Blumpkin
im not, i will try the wire thing im just hoping i can just change the fuse, sorry im just in a rush
You don't change the fuse, it's soldered on the board inside. You get someone who knows what they're doing to solder a new one in.
But you do what holdenboy said to test if that's the problem.
[edit-fixed]
Remove the head-unit and using a small section of wire touch one end to the chassis of the head-unit and the other end to the outside of the RCA socket
Blumpkin
will do that, and if it isnt that then wht other things am i looking at?
Custom Car Stereo Systems
Ah not really Stone, i got mixed up......one end of the wire goes to the outer ring of the RCA plug and the other goes to the metal bracket the stereo screws to, lol.
Do this while the stereo is on and all RCAs are plugged in.
150db in a commodore =
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