My SPEAKERS WHINE

[nick3470 10+ year member]

I just hooked up my new amp to run my 6x9s and i wanted to know why my left speaker whines and when I turn on my car it gets louder. My right speaker doesnt even put out any sound!!!!!!!!!!!!!!1

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[MikeofTulsa Moderator]

bad ground most likely your culprit

 

[chris229 10+ year member]

Originally posted by Goddyd4me bad ground most likely your culprit

noooooooooooooooooooooooooo--don't say that-----//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif :crazy:

grounds DON'T cause noise-----

he should----------make muting plugs---and test

 

[Frraksurred 10+ year member]

Don't know why one spkr would work and the other not, unless it's a loose wire or something. However if you ground your amp and your deck to the same point (nice solid bare metal ground point) it should take care of your engine whine. If one point still gives you noise try another. If after 3 tries you're still getting noise you're picking up the noise some where else. You can pick up some good info here if you're interested.

Let me know if it works.

 

[chris229 10+ year member]

Originally posted by Frraksurred Don't know why one spkr would work and the other not, unless it's a loose wire or something. However if you ground your amp and your deck to the same point (nice solid bare metal ground point) it should take care of your engine whine. If one point still gives you noise try another. If after 3 tries you're still getting noise you're picking up the noise some where else. You can pick up some good info here if you're interested.

 

Let me know if it works.

come on man---------star point grounding----- first it just isn't that easy to fix
the muting plugs go into the amp

 

[Frraksurred 10+ year member]

They are about 200 reasons for noise and each has a multitude of possible fixes. However the ground loop problem is most common and while it's not a complete analysis of what could be wrong, it is a place to start. I offered the link in case that isn't it.

BTW, you didn't explain what a muting plug is, or how to use one, or offer a site that could explain it. So how is that supposed to help him? I was being as helpful as I could be. With your knoledge I'm sure you could provide a much more indepth answer that would benefit both he and myself. So why not do it?

 

[MikeofTulsa Moderator]

Originally posted by chris229 noooooooooooooooooooooooooo--

don't say that-----//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif :crazy:

 

 

grounds DON'T cause noise-----

 

he should----------make muting plugs---and test

i was actually thinking that a bad ground for his head unit might be the culprit......but your the expert....

 

[chris229 10+ year member]

Originally posted by Goddyd4me i was actually thinking that a bad ground for his head unit might be the culprit......but your the expert....

better answer

 

[chris229 10+ year member]

ground loops are caused by low AC-DC isolation in the power supply of a amp or processor. current leak through the power supply into the signal wires tring to find a better ground.

so you see it is the low isolation cause the noise not the ground---------- if you designed a 12V audio processor would you make sure that no matter what the power supply conditions are you wouldn't hear it------

bad HU ground is something else totally------as that is the REF for the signal

muting plugs------------------------------------

muting plugs are simply a shorted out RCA plug. like so

http://www.davidnavone.com/richardclark/mute1.jpg

make enough to plug into all channel of any noise making amp. If the amp shuts up the noise must come in upstream. If it doesn't it must be the amp or something downstream...

the idea is simple........ give a amp or processor 0v signal with 0 impedance the unit should shut up------ if it doesn't ------noise is coming from or after the unit

 

[MikeofTulsa Moderator]

yea i probably should have been a bit more specific

 

[maylar 10+ year member]

I had an alternator whine that defies explanation. I had two pair of 17' RCA cables comming from the rear HU channels. One set went through a dash-mounted volume control for my subs, the other was for the rear speakers. Front / rear channels were a USX 4065, the subs were on a RF 2 ch amp. The alternator whine came out the ~front~ speakers, really nasty.

I rewired the system to use the USX amp for the subs (still with volume control) and the fronts off the RF. Noise went away. No change in grounds.

Only thing I can figure is that 2 long cables are too much load on the HU preouts, and somehow made it susceptable to alt noise. Really dunno.

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[Frraksurred 10+ year member]

Chris229, thanks for the expanded explanation. Makes good sence, and now I understand.

I enjoy learning so getting around guys like you is a serious bonus to forums like this. Keep it up and thanks again. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[chris229 10+ year member]

Originally posted by maylar
Only thing I can figure is that 2 long cables are too much load on the HU preouts, and somehow made it susceptable to alt noise. Really dunno.

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif ]

that is odd---- it could be figured out by muting on thing at a time.loading on the HU outpus doesn't cause noise------though over loading will decrease SQ--- but not in a alt whine way

though if I understand correctly ------ your HU should still be driving 2 long cables right ? The only thing you changed is the amp that is driving the fronts

 

[maylar 10+ year member]

Originally posted by chris229 that is odd---- it could be figured out by muting on thing at a time.

loading on the HU outpus doesn't cause noise------though over loading will decrease SQ--- but not in a alt whine way

 

though if I understand correctly ------ your HU should still be driving 2 long cables right ? The only thing you changed is the amp that is driving the fronts

When I disconnected the 2nd set of cables the noise went away. So I decided not to amp the rear speakers.