Question about Jl Audio 500/1 Car Audio Amplifier

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Low ohm light wont go off

Ive been running 3 amps in my explorer. 2 500/1's and a 300/4. the 500/1's run two 10w7's sperately. one of my 500/1's low ohm light came last week. so i checked all the wires for compromises and they were fine. so to test i unhooked that amp and put the other 500/1 where the low ohming amp was and it worked fine! i then plugged the low ohming 500/1 into my buddies wiring and the light came on again and wont turn off? can anybody help? ive thought of every type of test and nothing helps! the only thing i can think of is that the amp is in protection mode. please help! thanks


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Re: low ohm light wont go off

Pbabin is correct, that would cause resistance to be at or near 0 ohms and the amp would pull a lot of current (if it did not go into protection mode).

Posted on Feb 12, 2008

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Re: low ohm light wont go off

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

Posted on Nov 09, 2007

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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

When i turn the volume up my jl 1000/1 amp turns off then turns back on when the volume is low what can i do to fix this?

2 things, either your pushing too much power into the imputs (if using high inputs) and clipping the signal, or your running the ohms too low (lower then the amp can handle safely) by running multiple speakers of too low an ohm each. For example if your amp is 4 ohm stable and your running 2 4 ohm speakers in parallel that makes 2ohms and the amp can't handle a load that low. You can consult your manual and it will give you illistrations of wiring and ohm loads

Oct 26, 2009 | Jl Audio 1000/1 Car Audio Amplifier

2 Answers

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

I have a audiobahn a400t and im running 2-12''jh45 mtx jackhammers the speakers are wired in parallel stabel @ 2or1 ohm. the speakers are in a ported box. how do i run my wires to my hook these up right to...

Hello rattle822,

A pair of JH4512-04's can be wired to 2 ohms if the subs themselves are paralleled. There's only one voice coil and it's 4 ohm. If wired in series, the final impedance to the amp would be 8 ohms. They cannot be wired to 1 ohm.

In bridged mode, your 4-channel amp is only stable down to 4 ohms. You can bridge 2 of the channels to provide a relatively low 200 watts RMS X 2. The best power solution for your subs would be to bridge channels 1 and 2 and wire one sub to it. Likewise, bridge channels 3 and 4 and connect the other sub. If you connect both subs in parallel, the impedance will be too low causing the amp to overheat and possible fail.

As for the settings: Low pass filter on, crossover somewhere between 80-100, input levels to match your receiver, and bass boost to your personal preference.

Hope this helps.

Aug 13, 2009 | AudioBahn Car Amplifiers

3 Answers

Will a JL audio 1000/1 amp run a orion HCCA 15

Hello evopower,

The JL 1000/1 will power the Orion HCCA OK.

It is stable only to 1.5 ohms so your best choice would be the 15.4 with dual 4ohm voice coils. In parallel, this would offer a 2ohm impedance. The 15.2 could only be wired for either a 1ohm load (too low) or a 4ohm load (less power).

Hope this helps.

May 16, 2009 | Jl Audio 1000/1 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

3 Answers

Help me...

If you had 4 single voice coil speakers you can create either of those 2 ohm or 4 ohm setups. If you run 2 of them in parallel you will get the 4 ohms. If you run 4 of them in parallel you will get the 2 ohms. In parallel I mean that you connect the positives together and run them to the positive on the amp and the connect the negatives together and run them to the negative on the amp. Let me know if you need more help. Good Luck.
-Andrew Hawkins

Jun 24, 2008 | Cadence TXA 6004 4 Channel High Power...

1 Answer

Low ohm light on with now RCA's or speaker wires attached? What is going on???? Sound is crap it was working fine for the last year ????????

ohms are impedance or the amount of current being blocked through the line. The lower the ohms the less resistance. Speakers run at a certain ohm (or at least are recommended to run at). Have you bridged your amp? Usually when you bridge your amp it lowers the ohms by half. You may have damaged something, especially if you bridged your amp and didn't bridge it properly.

Jan 31, 2008 | Jl Audio 450/4 Car Audio Amplifier

2 Answers


when your amp cuts out,is it when your stereo is produceing a long low note.if it is then the problem lies within the power distribution from the your sub pulles a long low note it draws a lot of power and sometimes the battery cant supply the power fast enough and the amp cuts out. useing a power cap is one way to solve the problem,but the best option for you to use becouse your running high powered amps is to have a sepparate battery for your audio using a split charging system.when your car battery is fully charged a relay swiches the power so that it charges the audio battery,so your auio system will have constant power without putting stress on your car battery. you can get thes from all good audio shops. hope this helps you.

Feb 25, 2007 | Kenwood KAC-9152D Car Audio Amplifier

2 Answers

Need help with cooling fan

Recheck your wiring if this is a new problem. Or if you know someone with a multimeter put it on ohms and check the resistance on the subs. Or if you have multiple subs unhook them all and hook them back up one by one and run it in between to see if the amp runs cooler. Remember you can not go to low on ohms. speakers hooked in parallel brings the ohms down fast. Four ohms and four ohms in parallel equals 2 ohms and so on. check the manual or on the amp somewhere to see how low of ohms you go.

Aug 25, 2006 | Kenwood Excelon KAC-X541 88W x 4 Car...

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