Question about Jl Audio 1000/1 Car Audio Amplifier

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Jl amp thanks for that iv bin using the amp for over a week on what its on now would that make any diference and it is a avg fuse but it has bin running ok for a week thanks

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If the battery is at or above 12v and the voltage at the amp (measured directly across the terminals of the amp) is 5v, that would require hundreds of amps of current which should easily blow the 80 amp fuse. If the fuse is defective, is would account for the voltage drop without excessive current draw.

Have you checked the ground connection between the amp and the vehicle's chassis ground point?

Posted on Aug 12, 2008

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I have a jl audio slash 500/1 series amp, and it keeps blowing the fuse. am i using the right one? which one should i be using?


if its the fuse in the fuse link then you should be using the a 50A fuse thats if on your amp there is fuses that total 60A when you add it up and if it still blows then you might have a short in the power wire between the battery and the 50A fuse

Aug 01, 2010 | Jl Audio 500/1 Car Audio Amplifier

2 Answers

Jl 1000/1 popping fuse


well you need to check to see if nt no shottage with the amp and also check if the fuse is not to low amp 20,,,, 25 if not put the amp in a separet 12 volt battery

Dec 10, 2008 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Clarification for jl amp problem


sounds very much like resistance was an issue and no they dont have an internal fuse sorry

Oct 12, 2008 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Jl amp


The amp may have blown output transistors and that's why the voltage is being pulled down so far. This should have blown the fuse. If you're using an AGU fuse or there is corrosion, these could also cause the voltage to drop.

Measure the voltage across the fuse holder when you turn the amp on. If the voltage is more than 2v, replace the fuse.

Aug 11, 2008 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Jl amp


If the power supply feeding the amp is OK, it should have blown the fuse well before the voltage dropped to 5v. What size/type fuse do you have in the power wire feeding the amp?


Aug 11, 2008 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Jl Audio 500/1 Car Audio


There are no fuses inside the amp.

Are any of the lights lighting up on the amp?

If so, which ones?

Jun 09, 2008 | Jl Audio 500/1 Car Audio Amplifier

2 Answers

Jl 1000/1 amp not working


If I'm not mistaken, the blue light is the low voltage indicator. You need to confirm that the voltage ON THE POWER SUPPLY TERMINALS of the amp never drops below 11 volts. If it does, the amp will shut off. It's possible that you have a bad connection or even a defective fuse that's causing the problem.

JL recommends a 100 amp fuse for the amp. If you use a fuse that's too large and something goes wrong, the amp may be very severely damaged (possibly beyond repair).

May 08, 2008 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Scratchy single channel on amp


I had the same amp! It is the JL 300/4 and one of the chanels came in really fuzzy. It sounded as if the the wires were touching during my installation. I called JL and a JL authorized dealer it would have costed me 190 dollars total to get the amp fixed. Instead I opened up the amp to see if anything looked out of the ordinary. When you open the amp, see if the green fuse looking things are aligned. If they are not aligned then straighten them out. I think they had gotten out of place from being dropped becaue I baught my amp used. My amp works perfectly now!

This is no joke man, I did this just yesterday and was really excited to save 190 bucks. I'm not a technical guy or anything all I know is the green things are located behind the out puts inside the amp.

Jan 09, 2008 | Jl Audio 300/4 Car Audio Amplifier

2 Answers

Jl amp


With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead to the B+ terminal of the amp. If the voltage drops below ~11 volts, you need to check the wiring for the B+ line to see where you're losing voltage..

You need to do this as the amp shuts down. Connect the meter and watch the voltage as someone increases the volume.

Dec 31, 2007 | Jl Audio 250/1 Car Audio Amplifier

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