Question about Car Audio & Video
Ground loops and engine whine cause common problems such as a high-pitched whine that varies with engine RPM's, various thumps while changing tracks, turn on/off thumps, etc.
There are various protective measures to take in order to decrease the likelihood of experiencing engine whine and ground loops.
A good pair of shielded RCA's may be the easiest way to avoid engine noise. Don't use patch cables or other el-cheap-o RCA's that are unshielded. I'm not saying you need to invest a small fortune in RCA cables, just make sure they are shielded.
This is perhaps the most common source of engine noise. Many times factory head unit grounds are poor. Relocating the ground wire or adding to the existing one will help reduce or eliminate ground loops.
If none of the above have worked, check the ground for the amplifier. Make sure it is grounded to the frame, battery, or other substantial metal surface. Make sure the metal is good 'ol fashioned detroit iron. Many cars use metallic alloys or composites that aren't very conductive. Avoid those at all costs.
Some claim this next fix is BS, and others swear by their grave that it works. But run your RCA's and power wires at least 18" apart. I route my RCA's on one side of the car, and power on the other. Couldn't hurt.
Many have had problems with Pioneer head units because of a poor internal RCA ground. To remedy this, simply wrap wire around the RCA's and screw the wire down to the head unit's chassis or another good ground.
I hope this helps :)
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Posted on Jul 29, 2009
Younhave a bad groun. A ground wire should be same size as power (gage) wire and NO longer than 1 foot.
Posted on Jul 29, 2009
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Posted on Jan 02, 2017
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