Ive been getting a problem where i get a crackling sound coming though my speakers. It started in the rear right speaker a couple of months ago and couldnt find the problem so i disconnected it. The other day it started to happen in the front left speaker.

It just crackles then sometimes it will sound like the speaker has blown. There is also a slight alternator whine but only though the front right and rear left speaker. When i turn the car off it goes back to normal although i get a whineing sound without the engine running. I cant work out what this is either.

This only happens when it is cold driving to work. Coming home i dont have a problem.

Can anyone help me?

what type of system are you running and also what gear do you have eg. seperate amps, new h/u and speakers
and also what type of power wiring are you using?

JVC KD-SX995 Head unit
Infinity 6.5" splits
Infinity 6x9's
Infinity 4 channel amp
Jaycar Responce Monoblock Amp
2 x MTX Thunder 5512 Subs
7" Screen
PS2 running off a power inverter form the ciggie lighter

Im running 0awg to a distro block. From there 4awg to each amp. The 4 channel has a 4awg ground and the mono a 0awg ground.

The 0awg is run down the drivers side and the rcas are down the passenger side.

I think that is all.

when you say that you hear a whining sound it doesnt sound like an intake sound? gets louder as the revs build up?

when you say that you hear a whining sound it doesnt sound like an intake sound? gets louder as the revs build up?

Yeah it does but its more of an underlying sound to the crackerling. This crackerling sound is a lot louder and doesnt change with the revs. Just a constant sound.

what type of battery have you got? maybe try adding another ground from the battery to the chassy and see if the noise stops unless you have added another ground when the system was installed. 4ga minimum

what type of battery have you got? maybe try adding another ground from the battery to the chassy and see if the noise stops unless you have added another ground when the system was installed. 4ga minimum

Just a century high performance. I havent added any extra grounds. Why would it be only coming though 2 of the speakers and why only in the mornings.

Stereo is coming out this weekend anyway for the drags so i want to sort it out before it all goes back together.

mate i have no idea maybe recheck the connections on you amps and speakers to see if any of them are loose. im getting stadick from my speakers and i havent had a chance to fix it cause i have no idea why its doing it, it was even installed professionally :nuts:, can you hear the noise when there is no volume or when a song is playing or both? maybe check your freq. crossovers and see if it changes or not

I get it with the volume at 0 and with music playing. Im worried that it might be a problem with the amp itself.

yeah it might be the amp or the speakers, do you know anyone else with a 4ch amp in there car that you can swap with yours to see if it does the same thing in there car

I know its not the speakers. I can put in a mates 4 channel amp but it only happens in the mornings at 5.30 when i leave for work. Doesnt do it in the afternnons.

Hmmm interesting...
Temperature related, possibly altenator or battery.

Maybe check voltage at each. Clean up your grounds at the battery. Top up the battery with fluids.

Are you doing lots of short trips?

I take it grounds for the amps are to a clean part of the chassis (sanded back etc)?


Is the same amp powering all 4 speakers? And two speakers arent having any problems?

If so its likely to be the rca run (assumed you have 3 rca runs for front, rear and sub.) Dont rule out the headunit either. Where is this grounded? Have you been unplugging any rcas with the power on? Might have a faulty rca track somewhere that is worse with low voltage.

Could also be condensation building up somewhere overnight, do u park ur car outside?

Crossovers could be getting a bit wet...

Are you doing lots of short trips?
Yes

I take it grounds for the amps are to a clean part of the chassis (sanded back etc)?
Yes

Is the same amp powering all 4 speakers?
Yes

And two speakers arent having any problems?
Yep. Front right and left rear are getting the sound. Front left and rear right are fine.

If so its likely to be the rca run (assumed you have 3 rca runs for front, rear and sub.)
You assumed correctly

Dont rule out the headunit either. Where is this grounded?
Its ground to the stock wiring loom.

Have you been unplugging any rcas with the power on?
No


Could also be condensation building up somewhere overnight, do u park ur car outside?
Yes

hrrmm front right and rear left eh?

Can you confirm that all rcas are in the right hole... Thats very odd. eg fade to front then balance to left / right

Fade to rear balance left/right. and make sure all your speakers are where they are meant to be.

hrrmm front right and rear left eh?

Can you confirm that all rcas are in the right hole... Thats very odd. eg fade to front then balance to left / right

Fade to rear balance left/right. and make sure all your speakers are where they are meant to be.

Yeah their all right unless someone is changing them on me. But i doubt that.

I think this may be caused by condensation. Is there anyway to stop it from happening?

Condensation where? How are your seals?

What equipment do you thinks being affected?

Condensation where? How are your seals?

What equipment do you thinks being affected?

Bootlid and the tire well seem to get some moisture.

The boot seal looks fine.

My 4 channel amp seems to be the only thing affected but on the 2 speakers listed in the first post. This is mounted on the left hand side of the boot when looking in.

Would there be a minimum operating tempreture for the amp?