Question about Jl Audio 500/1 Car Audio Amplifier

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Low ohm light on my jl 500/1

The light stays on even with no rca's or spearker wire are hooked up...please help best amp i've ever had.i even hooked it up in a differrent car and the light still came on im clueless...n e solutions.....u know of n e good repair shops

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  • DA9kid Apr 03, 2009

    i connected my JL 500/1 to my radio and it will play for less then 2 seconds perfectly fine,then after the low ohms light turns on and a wierd noise is heard from my subs,but not RCA wires are connected so i disconnected both my RCA's and my speaker wires and the light still turns on. If anyone knows wat may be wrong or suthing that i may be doin wrong pliss let me kno ASAP email me at LaRrYzZ91@tmail.com thank you

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If the low impedance light is on, the amp probably has shorted output transistors. If you don't know of a good local repair shop, call 'several' of the local audio sales/installation shops to see who they use. If more than one audio shop recommends the same repair shop, they probably do good work.

Posted on May 10, 2008

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I have a 500/1 mono jl audio amp and two w3 10" woofers, every time my bass hits hard my low ohm light will flicker on and off but the light doesn't stay on to long it only flickers every time the bass...


not really a problem, your just running a the threshold of the amps comfort zone, a lil trick to raise your impedance a little bit its to run an additional 10 feet of wire before your sub, (longer the wire the more resistance) 10 feet should jump you up about .5 ohms. you wont hear the difference but your amp will fill it, and run a little better. 20 feet will give you right around 1 ohm. now if you dont mind loosing some power run the subs in series and then run them bridged. your amp will work harder, but run easier because its on a big open loop. but before all this take a multi meet and read out your voice coils to see what the ohm level is, then read out what it is at the speaker, then you will see 1. if the subs are okay, and 2. how much you need to raise your impedance for you amp to run comfortably.

Aug 09, 2010 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

How do i wire two audio pipe dvc woofers to this amp. do i use all four terminals on da amp. jl audio 500.1


Hello smoovek2008,

The JL Audio 500/1 outputs 500 watts RMS into a load from 1.5 to 4 ohms. Whether your subs have 2 ohm or 4 ohm voice coils, they should be wired in series and the subs paralleled to the amp. The final load to the amp will be either 2 ohms or 4 ohms, both of which the amp can handle. If you parallel the voice coils and then parallel the subs, the final impedance will be either 0.5 ohm or 1 ohm, both too low for the amp.

You can wire each sub to a separate set of terminals or both to the same set. The terminals are connected internally. It doesn't matter which of the +'s or -'s you use.

Hope this helps.

Sep 25, 2009 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Low ohm light on 500/5 front left channel doesn't work.


The first thing is to meter all the speakers with a volt/ohm meter. They should read somewhere between 2-6 ohms. If they meter good try swapping the RCA's and see if there is any difference. But if both of those check out ok than. Unfortunately it would appear that your amp has a bad output channel. What seems to happen is that when the amp is cycled off and on, off and on etc. the solder on the PCB can get brittle causing problems. The only answer i can offer is to send it to JL to repair or find a good repair shop that works on car audio amps. It's getting harder to find a good tech but they are out there. If you send it to JL they have a set repair rate of $180.00 which covers the return postage while the customer pays the shipping cost getting it there. They do an excellent job and pretty much go thru the whole board and replace not only what is wrong but will also perform any mods or changes since date of manufacture.

Aug 12, 2009 | Jl Audio 500/5 Car Audio Amplifier

1 Answer

Jl audio 500/1 amp low ohm light at high volume


I would try running the subs in parallel. Pos to Pos Dual Voice, Neg to Neg Dual Voice. Then Run + to + stereo - to - stereo on both channels.
So you have + and - running to one channel and + and - running to the other channel.
Also your LPF filter could be set too high.

Feb 07, 2009 | Jl Audio 500/1 Car Audio Amplifier

2 Answers

JL audio 500/1 produces barely any sound


have you checked the input sensor on the amp?

Oct 28, 2008 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

500/1- Low ohm light


Disconnect the speaker wires from the amplifier's terminal block. If the low ohm light still comes on with no speaker wires connected, the amplifier will need to be repaired.

If the light no longer comes on, check the speakers and the wiring.

Jul 15, 2008 | Jl Audio 500/1 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

1 Answer

Low ohm light on with no speakers connect??


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

Dec 26, 2007 | Jl Audio 300/4 Car Audio Amplifier

2 Answers

Low ohm light wont go off


It's likely that the output transistors failed in the amplifier and it will need to be repaired.

Nov 08, 2007 | Jl Audio 500/1 Car Audio Amplifier

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