trouble with my jl audio 500/1 amp

[jm25 10+ year member]

That Jl amp is not that strong, and will not push two 12 R's good. I've installed a few 500/1's on W3's, W6's, and W7's. I've also owned a total 6 Type R's. You probably haven't heard enough real systems if you were impressed with the 500/1? It's a great amp if that's all the power you need. You could have got a Hifonics Brz2100.1d for about the same price or lower and it would have gave the R's all they could handle. A Crescendo BC2000 amp is about the same price to and would totally destroy the 500/1 in output. I just hate to see people spending all that money just because it's JL.

everybody has there own opinions but thanks 4 the advice

 

[jm25 10+ year member]

I know it's frustrating but I really think this could be the problem.
If you have a piece of 4ga wire long enough to reach from the battery to the amp you could verify that the ground really is the issue. Just connect one end of the wire directly to the batteries negative and the other end to the amps ground. That will bypass the chassis ground and the amp should turn on without the Low V light.

I totally understand what you are saying. When you test the resistance through the ground wire to the panel the ground is bolted to you get 0-.1Ω and that is good. It means the current shouldn't have any problem passing between the amp and the panel the ground is bolted to, but that test only shows that the connection from the amp to that specific panel is good. It doesn't verify that the current is able to pass between that panel and the battery to complete the circuit though. When you put one probe on the door jam and the other on the loose end of the ground wire it showed that the door jam and the panel the ground is bolted to do not have a good connection. The door jam is structural and likely has a very good connection to the battery. So, if the panel you connected your ground to doesn't have a good connection with the door jam, it likely doesn't have a good connection with the battery. The only way to verify that is to test the connection all the way to the battery.

Thanks a million times it worked i regrounded it but the best spot was towards where the spare tire goes so i had to drill a whole n used a 10 mm head bolt made sure it was sanded down to bare metal and it worked thanks again:crazy!!!!! //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[LosIsATool 5,000+ posts]

everybody has there own opinions but thanks 4 the advice

Its not opinion, your putting 500 watts to 1000 watts worth of subs! Thats fact. But if your happy go for it. Just set the gains right or your going to clip the hell out of that amp

 

[vaiboy 10+ year member]

Thanks a million times it worked i regrounded it but the best spot was towards where the spare tire goes so i had to drill a whole n used a 10 mm head bolt made sure it was sanded down to bare metal and it worked thanks again:crazy!!!!! //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

Awesome, I'm glad it finally worked out!

 

[jm25 10+ year member]

Its not opinion, your putting 500 watts to 1000 watts worth of subs! Thats fact. But if your happy go for it. Just set the gains right or your going to clip the hell out of that amp

maybe if you read the rest of the post i also have a 1000/1 jl audio buddy so thats 1500 watts

 

[jm25 10+ year member]

Awesome, I'm glad it finally worked out!

just when i thought it was over.... the 500/1 is running perfectly but now the 1000/1 is acting up its given me power but along with it is the yellow which means low ohms and shortly after that i get thermal...so what can it possible be now the ground still ?

 

[LosIsATool 5,000+ posts]

Are you running two different amps to 2 subs?

 

[jm25 10+ year member]

nope i got the 500/1 pushing a 3rd type r i added just for kicks the 1000/1 is pushing the other 2 type r 12`s well atleast trying to

 

[LosIsATool 5,000+ posts]

What is your electrical like, those Slash amps are very power hungry

 

[vaiboy 10+ year member]

just when i thought it was over.... the 500/1 is running perfectly but now the 1000/1 is acting up its given me power but along with it is the yellow which means low ohms and shortly after that i get thermal...so what can it possible be now the ground still ?

The Low Ω light means the subs are wired to the wrong impedance or there's a short in the speaker wiring.

The Thermal could be a result of the Low Ω or the input sens. is not set properly.

I would need to know how you have everything hooked up and the nominal impedance and voice coil configuration of the subs before I make any suggestions on how to fix this.

 

[jm25 10+ year member]

i have a H.O. altenator and i also have a rockford farrad i havent hooked up but i disconnected the 500/1 and the 3rd type r soon as i realized the prob

 

[jm25 10+ year member]

The Low Ω light means the subs are wired to the wrong impedance or there's a short in the speaker wiring.The Thermal could be a result of the Low Ω or the input sens. is not set properly.

I would need to know how you have everything hooked up and the nominal impedance and voice coil configuration of the subs before I make any suggestions on how to fix this.

the subs weren't connected i was just testing the amp all that was connected was power,ground,remote

 

[vaiboy 10+ year member]

the subs weren't connected i was just testing the amp all that was connected was power,ground,remote

How exactly were you testing them?

If there were no speakers connected the low Ω and thermal should not happen. If you turn the amp on again does the low Ω light come on immediately? Sounds like there might be an internal short.

 

[jm25 10+ year member]

How exactly were you testing them? If there were no speakers connected the low Ω and thermal should not happen. If you turn the amp on again does the low Ω light come on immediately? Sounds like there might be an internal short.

power ground remote was connected and thats all i turned the car on n the power n low light came on then it went into thermal but i dont understand before my friend gave me the amp i was in his car and his system was working great

 

[vaiboy 10+ year member]

power ground remote was connected and thats all i turned the car on n the power n low light came on then it went into thermal but i dont understand before my friend gave me the amp i was in his car and his system was working great

The only thing I can say is be sure there are no wires in the speaker terminals that could be touching each other or the trunk floor, and there are no metal objects that could be touching the speaker terminals. Then turn the input sens. all the way down and try to power the amp up again. If the lowΩ light comes on again just shut the amp off. You might try calling JL at this point, to see what they suggest. I don't think a power or ground problem could cause this, but they might know something I don't.