Alternator Wine
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Elder User
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From: Canastota
Alternator Wine
Now that I have the amp and everyhting working, there is alt wine in the speakers. And it is VERRRYY annoying, i have to have the music up realy loud not to hear it (not that loud is bad). Is there anything i can do to stop it? I checked all the grounds. The power wire to the amp has to run by the speaker output lines( thats where its coming in?) What are your recomondations? A filter or electromagnetic shielding? I tried a Heavy Duty Filter from radio shack and it did nothing. Any Help??
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First; re-run your signal wires on the opposite side of the vehicle from the power and remote leads. This should fix the problem right there.
Try regrounding your head unit by its chassis, not by the wire in the wire harness.
Doublecheck ALL of your vehicle's grounds, not just the ones in your stereo. EX: body>chassis, engine> chassis etc... Check the resistance between each ground point of the components of your stereo system.
Try regrounding your head unit by its chassis, not by the wire in the wire harness.
Doublecheck ALL of your vehicle's grounds, not just the ones in your stereo. EX: body>chassis, engine> chassis etc... Check the resistance between each ground point of the components of your stereo system.
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Elder User
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From: Canastota
Its kinda hard to re route the wires. The output wires are where the power line comes in. I checked the chassis and noticed that the one from the cab to the frame was bad. Could that be a cause? Ill fix that asap. I can just ground the radio to itself and not have any problems?
Posting Guru
Joined: Dec 2003
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From: Northern California
Most amp mfgs. reccommend running a negative (ground) cable side by side with the power cable going from the battery all the way to the amp, the gage of wire being the same size as the power requiremnet for the amp also. Sometimes this will get rid of body grounding noise interference.
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From: WA
Originally posted by 94F150-408
Most amp mfgs. reccommend running a negative (ground) cable side by side with the power cable going from the battery all the way to the amp
Most amp mfgs. reccommend running a negative (ground) cable side by side with the power cable going from the battery all the way to the amp
Posting Guru
Joined: Oct 2003
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From: northern ca
Originally posted by acerockola77
No, that was an old technique. Doing that now will cause problems in most modern amps.
No, that was an old technique. Doing that now will cause problems in most modern amps.
running the power wires side by side theoretically cancels noise because any interference induced into the power line affects POS and NEG equally and since they are opposite polarity.Pro Audio at concerts uses a similar design for low level signals like mics.
I'm not saying this technique would solve the problem, just don't understand why it would be harmful. anyone?
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Posting Guru
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From: WA
No - I didn't just decide to make that up.
I do not remember why this was, I'm not an electrician or anything but there was a post a long time ago on this board where someone was having lots of problems with their amp, finally after posting back and forth for awhile they figured out that he had run the ground directly to the battery. One guy who installed audio equipment went on into a long explination and into a lot of detail of why this could not be done, and that it was an old technique. It ended up that that was the problem, and they solved it. I never would of thought of that. My memory sucks and I cannot find the post so I cannot explain why.. But I do remember that is what the technique was in older amps.
I'll try and locate that post and maybe someone else who knows will chime in.
I do not remember why this was, I'm not an electrician or anything but there was a post a long time ago on this board where someone was having lots of problems with their amp, finally after posting back and forth for awhile they figured out that he had run the ground directly to the battery. One guy who installed audio equipment went on into a long explination and into a lot of detail of why this could not be done, and that it was an old technique. It ended up that that was the problem, and they solved it. I never would of thought of that. My memory sucks and I cannot find the post so I cannot explain why.. But I do remember that is what the technique was in older amps.
I'll try and locate that post and maybe someone else who knows will chime in.
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Question is your power wire to the amp and you rca cables running down the same side of the car? If so this will be your problem. The rca's are what is sending the signal to the amp then the amp for all intensive purposes turns it into what you hear. If the rca's and the power wire are running next to each other then the rca's are going to carry that engine noise to the amp and the amp will send it to your speakers.
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Elder User
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From: Canastota
I forgot tomention htat i am running speaker level inputs. As of right now I cannot afford a better head unit with rca outputs. I have the input/output wires running down the middle of the car and under my ctr counsel. the power line exits the amp next to the output lines, parallels them for 2-4in and then goes along the drivers side. It is unavoidable. I have the grnd and power lines in paralles for a ways until it hits its grnding pt. Should I change this?
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Joined: Nov 2003
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From: Lafayette, Indiana
Dont run the RCAS next to the power, make sure the paint and everything is gone from the grounding point, ie paint rust etc etc and seal with silicone to prevent corrosion. Make sure ground is 12" or less and is the SAME or larger in diameter than your power. Not smaller. Dont coil the rca as well. Bout all i can say. If you found a loose ground, fix it.
The off topic issue described above sound like a floating ground, i can go into it if need be.
When in doubt, buy on o these. http://cgi.ebay.com/ws/eBayISAPI.dll...category=14932
The off topic issue described above sound like a floating ground, i can go into it if need be.
When in doubt, buy on o these. http://cgi.ebay.com/ws/eBayISAPI.dll...category=14932
Senior User
Joined: Nov 2003
Posts: 377
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From: Lafayette, Indiana
Dont run the RCAS next to the power, make sure the paint and everything is gone from the grounding point, ie paint rust etc etc and seal with silicone to prevent corrosion. Make sure ground is 12" or less and is the SAME or larger in diameter than your power. Not smaller. Dont coil the rca as well. Bout all i can say. If you found a loose ground, fix it.
The off topic issue described above sound like a floating ground, i can go into it if need be.
When in doubt, buy one o these. http://cgi.ebay.com/ws/eBayISAPI.dll...category=14932
The off topic issue described above sound like a floating ground, i can go into it if need be.
When in doubt, buy one o these. http://cgi.ebay.com/ws/eBayISAPI.dll...category=14932
Posting Guru
Joined: Dec 2003
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From: Northern California
Old school on the ground wire to the battery?? I think not!
This is a direct quote out of a Precesion Power PC 2150/2350 installation manual (it's truely hard to dispute PPI's reputation, and this is exactly how I have hooked up many PPI amys, with absolutly no whine in any of my sysyems...ever!)
Quote (pg6): "If your grand total current draw is over 50 amps (or total output power is over 300 watts), you should run a ground wire beside your power wire from the battery to the amplifier(s) in addition to your regular ground wire. Keep the ground and power wires as close together as possible, and use the same gauge wire for both. This will ensure that you have a good ground path, and may eliminate such potential problems as engine noise and overheated amplifiers."
"
No problems can be created from this, it is nothing more than creating a good ground.
I'd sure try what one of the top amp mfgs reccomend!
Good luck!
Kevin
This is a direct quote out of a Precesion Power PC 2150/2350 installation manual (it's truely hard to dispute PPI's reputation, and this is exactly how I have hooked up many PPI amys, with absolutly no whine in any of my sysyems...ever!)
Quote (pg6): "If your grand total current draw is over 50 amps (or total output power is over 300 watts), you should run a ground wire beside your power wire from the battery to the amplifier(s) in addition to your regular ground wire. Keep the ground and power wires as close together as possible, and use the same gauge wire for both. This will ensure that you have a good ground path, and may eliminate such potential problems as engine noise and overheated amplifiers."
"
No problems can be created from this, it is nothing more than creating a good ground.
I'd sure try what one of the top amp mfgs reccomend!
Good luck!
Kevin