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Repair manual jl 300 - Jl Audio 1000/1 Car Audio Amplifier

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Jl audio 300/4 low ohms light wont go off


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

Aug 15, 2009 | Jl Audio 300/4 Car Audio Amplifier

1 Answer

Got jl300/2 amp confused which subwoofer sounds good


Hello drsubhakar26,

JL W6's will perform well with from 150-600 watts RMS. W7's with from 150-500 watts. Less expensive Alpine Type R's work OK with from 200-500 watts RMS. Either of the brands will sound good. None of them will perform to their full potential with 300 watts RMS. Powering any sub with a 2-channel amp is a compromise. A monoblock is more efficient.

Hope this helps.

Jul 12, 2009 | Jl Audio Slash 300/2 Car Audio Amplifier

1 Answer

Jl audio 1000/1 low voltage -keeps shutting off at high volume


You should definitely upgrade the power wire to the sub amp to 4 gauge -absolutely your choking your amp its starving for current-poor thing is starving !!!!!!!

Apr 16, 2009 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

JL 300/V2 shuts down


you may have a weak power supply, check for proper ground ( clean contacts with a tight bolt to chassis), or too low speaker impedance because too many speakers or shorted speakers or leads to ground.

Apr 10, 2009 | Jl Audio 300/2 Car Audio Amplifier

1 Answer

JL 300/4


maybe the remote power lead for the high's amplifier is loose...

May 17, 2008 | Jl Audio 300/4 Car Audio Amplifier

1 Answer

Hey quick question on JL 300/4V2 impedience light


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.

Mar 29, 2008 | Jl Audio 300/4 Car Audio Amplifier

1 Answer

500/1 and 300/4 jl


Need more info here. did you run power from the 500/1 to the 300/4, or did you run the signal from the 500/1 to the 300/4? Also which amplifier is cutting out for a min...the 500/1, the 300/4, or both? each amp should be wired to a distribution block with 4 awg power wire recommended for each. the amps should also be wired without any capacitor.


Mar 17, 2008 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Amp cell went bad!!!


You may be able to find a local shop that can repair it. If you want to send it to JL for service, you'll have to go through an authorized dealer.

Service FAQs

Dec 04, 2007 | Jl Audio 300/4 Car Audio Amplifier

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