Weird Whine
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=35125
Printed Date: May 18, 2024 at 4:43 PM
Topic: Weird Whine
Posted By: z28plus
Subject: Weird Whine
Date Posted: July 06, 2004 at 12:34 PM
Just installed an amp for my sub and a pr. of Focal componets. When the truck is running, I get a whining sound through the speakers, but only when its running??
I am running two sets of RCA's and a LOC, as well as 4ga power cable. I have heard that if you run the power cables next to the RCA's then you may have a problem. Any truth to this.
Replies:
Posted By: DYohn
Date Posted: July 06, 2004 at 12:54 PM
Yes, power and signal cables should be seperated as much as possible. The most common causes for engine whine include: bad ground on amplifier or head unit, bad RCA cables, bad LOC, damaged or grounded speaker wires, induction into the signal cables or the LOC from power or ground cables, or bad ignition system components in the vehicle. To isolate it requires a slow, methodical approach. Try one thing at a time. Good luck! ------------- Support the12volt.com
Posted By: rallysport
Date Posted: July 06, 2004 at 12:54 PM
yes, try running them on opposite sides of the vehicle and see if that helps. generally if your running sub amp without amping up speakers youll be fine running power wire with rcas but when powering speakers its best to seperate the power from the rcas by 36 inches or so.
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Posted By: z28plus
Date Posted: July 06, 2004 at 2:16 PM
ok, i will try that, this is a 4-channel amp that is powering a 1 JL sub and a pr of focal componets.
any other feedback is appreciated.
Posted By: forbidden
Date Posted: July 06, 2004 at 5:14 PM
Where did you ground the amp to? ------------- Top Secret, I can tell you but then my wife will kill me.
Posted By: z28plus
Date Posted: July 06, 2004 at 7:12 PM
grounded to the body in the door sill?
Posted By: Alpine Guy
Date Posted: July 06, 2004 at 10:21 PM
I usually find the problem to be the remote turn on wire. It should go away if you jump the power wire on the amp to the remote terminal instead of getting power from the ignition. Try that, if it goes away, then you will need to throw a relay in the remote turn on wire. But don't leave the remote wire jumped from the 12v power to your amp, , it will keep the amp running all the time and kill your battery. ------------- 2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: z28plus
Date Posted: July 07, 2004 at 10:42 AM
I have the remote wire connected to a PAC harness that had a remote wire and RCA's coming out.
Posted By: DYohn
Date Posted: July 07, 2004 at 11:16 AM
That could be part of the problem. Don't run remote wire and RCA together. Split it out. ------------- Support the12volt.com
Posted By: nychris2004
Date Posted: July 07, 2004 at 11:53 AM
everybodys right but the problem is definitely running the rca's and the power wire together..u can have the rca's with the remote wire, but them and the power wire WILL make noise 95% of the time, this much i do know =)
Posted By: forbidden
Date Posted: July 07, 2004 at 12:15 PM
My vote is still a difference in ground potentials........
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Top Secret, I can tell you but then my wife will kill me.
Posted By: DYohn
Date Posted: July 07, 2004 at 12:44 PM
Yes, I agree grounds are very much more likely the cause than induction from the low current remote wire, but it is possible. Ground problems are indeed the most likely culprit. Or bad engine ignition wiring. ------------- Support the12volt.com
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