Question about Jl Audio 500/5 Car Audio Amplifier

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Ignition noise when playing a cd, in quiet passages I hear ignition noise like a whine, and it increases with engine speed, plus the sound is crackling

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The sounds you are hearing are usually due to one of two things:

  1. The RCA preamp cables between the head unit and amp are either run too close to the +12V line or the connectors are touching a metal object.
  2. The ground connection is too long or not as clean/solid as it should be.
To fix problem #1, just make sure the RCA lines are on one side of the vehicle and the power is on the other.

To fix problem #2, make sure your ground connection to your amp is as short as possible (ideally <2ft) and is tied to a clean (ie no dirt, paint, grease) point on the chassis.

If the issue still exists, search the web for a ground loop isolator.

Posted on Apr 04, 2008

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