JeffersonC

Alright, car runnin stereo on, no sound, you can hear this almost buzzing noice from speakers. I check to make sure Main power wires are not near any other wires, etc.
I find when I rev up the car, the noise gets louder and faster. So it has somthing to do with my Alternator, and power wire.
Could this sound be caused by a bad alternator, or power wires close to other wires.
I have a 1977 Monte Carlo, with the stock 305 engine. Upgraded battery, Big 3, All clean sanded grounds with paint over them to reduce corrosion, and terimal ends all clean.
Thoughts ?

1LoudScort00

iTrader: (2)

I'm having the same problem, expect I havn't done big 3, and i've gone over all those things, and still nothing.

zzzzzzz

iTrader: (5)

try adding a neg to the deck
if you have the same OMS at the deck amp and line drive (you will not have a alt buzz)

JeffersonC

Well I do have a neg on the deck.
What do you mean by OMS ?

zzzzzzz

iTrader: (5)

get a multimeter set it to OMS (like on a sub it is a VC 4oms sub) so if you have the same oms on all the toys in your set up you will have no buzz

so decks have a buzz you would need to ask what decks do (i do not know what deck do have it )

so if you have tried all things you may need to try a new deck but i would try this 1st

JeffersonC

If you mean OHMS, then yes. From my deck, to a line converter, those RCA's to my Legacy La290 amp, 4 channel, 100w X 4. 4ohm output, to each of my door and rear speakers, which are 4ohms.
Then the rca output set on the back of the deck, to my 2 kenwood kac9102D amps. 2ohm output. To my 2ohm subs, each wired seperatly to each amp.

I tried adjusting the line converter, but I am still getting buzzing, by the sound of the alternator.

zzzzzzz

iTrader: (5)

use a multimeter at the deck + & - what do you get ?
now go to the nexted thing what do you get ?
and so on
if you get the same # on all toys then that is not where it is coming form if you see more then one # come up then you need to get them all the same # by moving your - wire

i also need to ask in your rca's are you using the 3rd wire in it ,if so how are you using it ?
and i think you are

JeffersonC

3rd wire on the RCA's are grounds.
Thanks, I will do some tests.

gumby!

iTrader: (2)

My guess would be to try swapping out your line convertor...

hustler

iTrader: (1)

had same thing... could hear the noise even if volume was at 0. did ground to same spot and grounded deck with 10gauge wire... think deck ground solved it.