Whining noise from speakers with rpm

[Davidfranklin1997]

I have a 2005 Chevy Tahoe I replaced the factory radio and added an amp and all new door speakers. I have all door speakers running to my amp. I’m getting a whine noise when the truck is running and it gets louder with rpm’s I can turn radio off and it goes away I can unplug my rca cables from amp the whine is still there. I have been going through all my grounds but can not figure out where it is coming from. Any help will be welcomed. Thank you.

 

[Trey Hardy]

Mine was fixed by changing out the rear ac/entertainment controls on the back of the center console
Try looking into that possibly?

 

[Doubeleive]

I have a 2005 Chevy Tahoe I replaced the factory radio and added an amp and all new door speakers. I have all door speakers running to my amp. I’m getting a whine noise when the truck is running and it gets louder with rpm’s I can turn radio off and it goes away I can unplug my rca cables from amp the whine is still there. I have been going through all my grounds but can not figure out where it is coming from. Any help will be welcomed. Thank you.

how did you run the wires?
power wires are usually ran down the drivers side and rca's/speaker wire are ran down the right
rca's should be shielded type
if you ran them together and/or did not use shielded rca's that is likely the source of your noise

 

[Myfirstz71]

I’ll take a stab……… does the amp power on with a remote wire from the head unit? If yes, this is why the whine goes away when head is off, but is still present when RCAs disconnected. The signal interference is at the amp. I’m not a huge audiophile, but my brother was. It will have something to do with the wire routing, where you are drawing the power or ground, and possibly what other wires are running nearby. You could also insert a noise filter, but I’m not sure where you wire that in. Maybe not as helpful as it sounded in my head.

 

[Joseph Garcia]

If you have disconnected all RCA cables from the head unit to the amp, and you still get the whine, I'd say that your amp is defective.

 

[Doubeleive]

If you have disconnected all RCA cables from the head unit to the amp, and you still get the whine, I'd say that your amp is defective.

it really depends on how the wires are routed, if the wires are ran together and the engine is running it could pick up the electrical noise
an amp just creating electrical whine for no reason would be pretty rare for car audio anyway, in any case it boils down to the ground, a ground loop isolator can "sometimes" fix the problem but it can only do so much. A ground always takes the shortest route.

 

[Joseph Garcia]

it really depends on how the wires are routed, if the wires are ran together and the engine is running it could pick up the electrical noise
an amp just creating electrical whine for no reason would be pretty rare for car audio anyway, in any case it boils down to the ground, a ground loop isolator can "sometimes" fix the problem but it can only do so much. A ground always takes the shortest route.

Even if you run the wires together, which I would never do, if the RCA cables are disconnected at both the head unit and the amp, they are no longer in the equation for whine, which is why I recommended that test.

Hopefully, the OP grounded the amp to a solid chassis connection, as close to the amp as practical.

 

[Davidfranklin1997]

I have only the power wire ram on the driver side everything else is ram on my passenger side. I have my ground not long at all and goes straight to the chassis to the amp. I just had the amp in my other car and had no problem with it. As the push the gas it whine gets louder I’ve re checked all my grounds. I went to reground my head unit and still no help could it be the interface I’m using has a bad ground inside of it ?

 

[Fless]

WAG: one thing to verify is the ground strap between the driver's side head and the underside of the hood.

 

[Davidfranklin1997]

If you have disconnected all RCA cables from the head unit to the amp, and you still get the whine, I'd say that your amp is defective.

I just had the amp in my other vehicle and had no problems with it at all it only occurs when the vehicle is running

 

[Joseph Garcia]

Perhaps it is the interface unit, which you had not previously mentioned. Is it properly grounded as well?

 

[Davidfranklin1997]

To run a after market radio I had to buy the radio interface kit so it would work I don’t have the pac one I have the stinger one it is a cheaper one

 

[S33k3r]

To be clear, you are only getting the interference when the truck is running, correct? If that is the case, you likely have a dirty power wire, that is allowing the field generated by the alternator to intrude on your sound system. I don't know enough about sound systems in general, or yours specifically, so I'll stick to what I am familiar with: The alternator may be starting to fail. You get these sorts of transient issues when they start to fail, and you could start seeing a reduction in MPG. Alternately (no pun intended), your alternator may not be powerful enough to run everything.

Good luck!

 

[Fless]

Cheap test: wrap the interface box with aluminum foil to see if that improves it. Don't wear a tinfoil hat when you do....

 

[Davidfranklin1997]

To be clear, you are only getting the interference when the truck is running, correct? If that is the case, you likely have a dirty power wire, that is allowing the field generated by the alternator to intrude on your sound system. I don't know enough about sound systems in general, or yours specifically, so I'll stick to what I am familiar with: The alternator may be starting to fail. You get these sorts of transient issues when they start to fail, and you could start seeing a reduction in MPG. Alternately (no pun intended), your alternator may not be powerful enough to run everything.

Good luck!

I replaced my alternator probably 2 months ago. I only have a Rockford fosgate 400x4 amp running my door speakers I don’t have my subs hooked up untill I can figure out what is going on. I will try replacing the power wire next. Thank you

 

[S33k3r]

What brand of replacement did you use for your alternator?

 

[Doubeleive]

are the rca's shielded? or just whatever was the cheapest?
I would ohm test your ground at the amp also, you should have basically 0 ohm's on the ground and the power wire should have pretty much whatever voltage is coming out of the alternator with very little to no drop.

 

[91RS]

You have a ground loop. Try grounding the radio and amplifier to the same ground. If not, get a ground loop isolater.

 

[Davidfranklin1997]

I believe the ac Delco alternator. I have Rockford fosgate shielded and braided rca’s the ground for my amp is grounded to the frame

 

[S33k3r]

Is it the pro line or the standard Delco line? My understanding is that there are multiple lines now, and that the top of the line stuff is what you want.