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Jl audio 300/2 amp not working, yellow " Low Ohm" light on

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  • anthony_c860 Sep 06, 2010

    ok but it stay's on without any speakers or RCA's connected

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  • 195 Answers

Sounds as if you have the speakers hooked up improperly causing too low of a resistance. Re wire to increase resistance.

Posted on Sep 06, 2010

  • DillyWackSac
    DillyWackSac Sep 08, 2010

    Send it in For Repair it is in Protective mode.

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1 Answer

JL Audio 1000/1 v2 distortion problem


Make sure all your connections are tight , really tight . Check ground , make sure it's to clean shiney metal. Three subs are going to have a low ohm load if paralleled . These amps are not 1 ohm stable ,if below 1.5 ohm's you will have problems. They need to be series paralleled to raise the ohm load. These amps put out the same power from 4 to 1.5 ohms.

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Depending on what light it is. It could be your ohm light, if it is your ohm light then you have something wired incorrectly. If it is another light, it could either be a power problem or it could be that your amp is damaged.If you would like, you may e-mail me and u can let me know which light is on. It SHOULD say right next to the light; which light is on. E-mail me at epayne123@yahoo.com and I will respond to you as soon as i recieve it.

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If the low ohms light is on then you have your speakers wired to low. I need to know some more info like what type of speakers you have running on this amp and how many. Also was it working before and then it started doing this? Check the ohms with a volt meter if you know how, if not just get a volt/ohm meter and set it to the ohms setting and then take the positive(red probe) and touch it to the positive terminal on the speaker and then the negative(black probe) to the negative terminal and see what it reads. Make sure you check how low in ohms your amp is capable of handling. If you don't know just google the model of your amp and you will find a site that has a manual or just go to JL audios web site and you should find out there with no problem. Let me know what you find so I can assist you more if need be cause I also repair amplifires for a living and have many years experienc and I'm the cheapest amp repair business you will find any where. Good luck

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1 Answer

Low ohm light stays on my jl 1000/1


you have your amp wired at too low of an ohm load for the amplifier. This is why it is doing this. Jl amps are awesome and pretty much make everything idiot proof. Not calling you an idiot but go online and search for that model on JL.com then look on either the box your subwoofers came in or on the back of your subwoofers. Find out which ohm load they are and how many voice coils. Next go to www.the12volt.com and find the subwoofer wiring diagrams close to the top of the page. Then enter in your information on your sub's impedence and how many you have then it will give you the wiring options that you have and it will probly tell you you are wired at like a .5 ohm load. And let me guess you turn it up too long or too loud and your amp gets hot and it goes into protection.

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Are you sure you don't have any shorted wiring or defective speakers?


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If you're referring to the orange "Low ohm" light, it's most likely caused by the amp detecting a "lower than optimum" impedance for it's gain setting. The quick answer is you'll probably have to go through the steps outlined in Appendix A of the owner's manual. This will set the amp gain and input voltage setting properly for your speaker and head unit setup.

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This can happen if the amp has an internal fault such as a shorted output transistor.

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Check the resistance between the positive and negative terminals of the speakers. There should be atleast 1 ohm of reistance depending on your set up... if there is very little there is a short in your wiring. If not remove the wires from the amp and now check the resistance between the termanls on the amp...there should be no condinuity...if there is your amp has short circited out.

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