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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2 Answers

Why am i getting a buzzing sound through my amp remote wire\


This is a common issue when you've added an amp. I assume you are talking about a alternator whine which changes pitch when the engine speed changes. If that is it then you won't hear it with the engine off and switched to Accessory, running on battery only. The noise is most likely being generated at the head unit and not the amp. I would get a noise filter and put it between the stereo head unit and it's power source. That should clear the problem up.

Sep 10, 2014 | Car Audio & Video

Tip

Car amplifier noise


Noise in Audio:
  • If noise is a "whine" that goes up and down with engine speed, confirm that Amplifier and any other source unit (Radio, EQ, X-over, etc) is properly grounded.
  • A "clicking" or "popping" noise at a rate that follows engine speed is generally induced by vehicles ignition system. Confirm that the vehicle is equipped with resistor plugs and plug wires. Or, ignition system may need service.
  • Speaker and input wires should not be routed next to the wired that interconnect lights and other accessories/equipment.
  • If above steps do not improve/clear noise interference, the system should be checked by a professional mobile audio installer.
If this tip in any way helped you please do not forget to rate it, thanks.

on Feb 21, 2010 | Car Audio & Video

2 Answers

Amp is making a whining or howling type sound


Sounds like Ignition system interference...Does whinning sound correspond with the accelerator? Make sure ground is isolated....and power is seperate from other circuits. ( ie; straight to battery with an in line fuse installed in it.)

Jun 05, 2014 | Rockford Fosgate Car Audio & Video

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Engine noise coming through one channel


This sounds like alternator whine. Do you have the power and ground connected to your battery, or through the accessory power? Make sure the power and ground wires are sufficient size, and connected to your battery, and make sure you have the power wire fused no more than a foot or two from the battery. If it is only on the right channely, maybe this wire is getting feedback from another wire. Seperate the wires if this is the case.

Wires create magnetic fields, and if a speaker wire is next to a power wire or something, you will hear a noise, typically high pitched whining.

Jul 13, 2010 | Jl Audio E6450 Car Audio Amplifier

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Was loud, now quiet, never changed any setings.


there are many possibilities here:
-one of the subs came unplugged?
-you blew one of the subs
-your amp is over-heating
-some wire has been fried in your amp
-the RCA outputs on your cd player are going bad.

May 09, 2010 | Kicker 06ZX750.1 Car Audio Amplifier

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I accidently shorted a speaker output to the frame with it on. Since this happened, I have a whine that is constant and increases with engine rev. The rca's are isolated from voltage, and the system...


Sounds like a one of your capacitors in the output stage of the amp, might have been damaged. You could also try a resonator on the 12 volt supply coming from the battery.

Sep 12, 2009 | Hifonics TXi4408 Car Amp

1 Answer

I cant stop the whine


Ok, if it only happens when the engine is running and the noise changes with the gas, that's alternator whine. Alternator whine is caused by the ambient noise in the voltage which is produced by the alternator. Alternators don't make DC current, they make AC current. The AC current is then converted to DC current and then sent to the rest of the car. The noise comes from an imperfect conversion from AC to DC. That noise travels down the power cable to the amp and causes noise in your speakers. This is often called "dirty power". Dirty power can be variations in voltage, inconsistent current, or noise within the voltage. One of the simplest ways to clean up noise in a car stereo system is to use capacitors. If you add a capacitor to your system just before the amplifier's power cable, it will help filter out the noise from the alternator. Start with 1/2 Farad or 1 Farad. That should be plenty to clean up the noise. The capacitors will also have a positive effect on your amplifier's thermal and sound performance, but you may not notice it.

May 14, 2009 | Performance Teknique ICBM-892 Car Audio...

1 Answer

Crackling noise in front left channel


chek u ground for the amp and make rca is not crimp any where and grounding out on body

Apr 15, 2009 | MTX TC6004 Car Audio Amplifier

1 Answer

Engine whine


You're hearing whine from the alternator as it charges the battery. You could reduce it by turning the input level down on the amp, or by adjusting the filter on the high end. You can also buy a whine filter kit.

One last thing... you may have blown one of the diodes in the Alternator itself when you shorted the speaker wire. It would still work and charge the battery, but would not be able to filter the whine like it should.

Hope that helps...

Geno

Mar 25, 2008 | Eclipse XA5000 Car Audio Amplifier

2 Answers

Amp problem on a bmw 3 serie


you have a ground loop problem that whining is called radiated engine noise.

Sep 30, 2007 | Rockford Fosgate Punch 800a2 Car Audio...

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