Question about Jl Audio 500/1 Car Audio Amplifier

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Amp powers up without remote turn-on hooked up. amp powers up and sends signal to the sub for about 30 seconds then shuts off. also when attempting to ground the amp, the ground wire sparks and snaps

Also can email me @ kaos002@hotmail.com

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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sodeep
  • 3267 Answers

SOURCE: Green power light on JL Audio 500/1 but no output

Its the power transistors that would be affected by low voltage. It delivered till it finally gave up 'cos the output wattage to be generated at low voltage means more current flowing through the equipment. This high current will adversely affect all small solenoid valves & transistors and IC's. Even failure of one section of any IC is rarely detectable with the naked eye. It has to be thoroughly checked with a multi-meter to assess the damage correctly......sodeep

Posted on Jul 30, 2009

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Shuttle83
  • 1139 Answers

SOURCE: jl 500/1 no sound, green light

This is an indication that the MOSFETs are ok but the driver stages may have a problem. Get a schematic find the pre-amp stages and test the voltages levels there as compared to the schematic. I do believe that you will find the problem in the pre-driver pre-amp atages.

Posted on Sep 06, 2007

tech48
  • 624 Answers

SOURCE: Can i wire 3 jbl gto1204d subs into 1 jl audio 500/1 amp

You can connect them in a series/parallel configuration. Put two of them in series and then connect the last one in parallel across the two in series. This would give you an impeadance of around 2.7 ohms. Only do this if your amp is stable at 3 ohms or less. I am not familiar with the specs of your amp. If your amp is only 4 ohm stable you can not do this.
This would also give you half the power on the two subs in series as the power for the one that is parallel. The two in series would be sharing the total output signal, where-as the one in parallel would get the entire output signal from the amp.
if you were to connect a fourth sub woofer in this configuration it could give you a 4 ohm load, by adding the fourth sub in series with the single sub that is in parallel. or in other words, yu have two sets of 2 sub woofers each in series. That gives you two 8 ohm loads (two 4 ohm subs in series is 8 ohms). Then you take the two sets of subs and parallel them (two 8 ohm loads in parallel equals 4 ohms).

If i had a picture to show you it would make sense, two subs in series that are in parallel with two subs in series.

Posted on Jun 16, 2008

GooFyTiS24
  • 33 Answers

SOURCE: i bought a 500/1 jl audio amp and also a w7 10 sub

if its cutting off and right back on then check your ground and your power wire makes sure both are connected good and none of your fuse's are blown, either that or you got a wire hooked up backwards in the sub.. but my guess is that the sub is hooked up wrong... that sub should be hooked up in a series or in parallel,

ok if your running just one speaker, it should be hooked up like this and 2 speakers are a different way...

this is parallel :pos to pos , neg to neg, then one wire coming from pos on sub to pos on amp then neg on sub to neg on amp but bridge the amp on your amp should be 2 pos and 2 neg in two different channels take the pos off the sub into the pos on 1 channel and then the neg from sub to the neg on the other channel,

this is series : on the sub it will go pos to neg then the other neg and pos will go to the amp, but make sure the pos and neg r on different sides of the sub, dont hook them both to the same coil

if your need more help give me your email and ill send you a pic of how to do it...


Posted on Aug 12, 2008

  • 2 Answers

SOURCE: my amp turns off when i turn it up, the low volt

check ur batterry post make sure there nice and tight i have the same amp same problem make sure the ground wire going to the batterry is clean and tight

Posted on Mar 25, 2010

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1 Answer

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ive seen that happen a couple times and i have a few solutions, but first whats the year and make of the car? and also did you splice the remote wire for the amp to the remote wire to the factory deck, or did you use a line out converter that picks up speaker current and sends a signal to turn the amp on? and last question is does just the amp stay on with no noise coming from the subs?

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Check your ground and make sure it is grounded to metal in your car with no paint. Also, make sure you are running 4 gauge power wire. Another possible cause could be that the ohm load is too low on the amp. Also, if your car battery drops below 10v it will send the amp into protection.

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the amp requires a 12 volt power constant, and a 12 volt "on" signal. you prolly have the 12 v "on" hooked up to the car stereo's antennae remote, meaning your amp gets power when the radio is on, cuase the radio is sending a signal to the amp (thinking that it is sending a signal to the antennae to raise)

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The person(s) who hooked up your system made a boo boo. They wired your remote turn on lead to the power antenna lead instead of the amp turn on line (both are blue and easy to mix up). Thus when your radio is on it sends a signal to the amp and the amp turns on, but when you set to CD the signal goes away and your amp shuts down. Easy fix, just re-wire the amp turn on lead and the problem will be fixed.

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if it only happens when you turn it up, you could be sending it too hot of a signal and its clipping so the amp is protecting it self and shutting off. Try lowering the input gain on the amp and see if that helps. It's also possible that your speakers are pulling to much power when you have it turned up that high and the amp is shutting down to keep from overheating. I don't know what or how many speakers you have hooked up, but if you have a sub, try it without that and see if you have the same problem. If you don't have a sub, disconnect the largest woofers you have. Different speakers have different ratings for how efficient they are. It's usually measured by how much SPL 1W will produce. You want to disconnect the speakers that are pulling the most power and try it again. If your speaker is pulling more power than your amp can supply, your amp could shut off because of that. As well as cook the voice coils in the speaker and damage the amp. It's always better to have too much power in your amp than not enough. There's an old joke I learned in audio engineering school "I can pass a square wave.....once."

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Remote wire hook up


The Remote wire should connect to the remote turn on lead from you radio(most aftermarket radios use a blue and white or a blue wire for the remote turn on). This wire will send a 12v signal to the amp from the radio when the radio is turned on. You can disconnect the remote turn on lead from the amp and jump a wire from the terminal marked battery to the remote turn on terminal just to see if the amp powers up. Do not leave it this way however because your amp will not shut off and your battery will go dead.

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No Subs in CD mode??


Ah, common problem. You hooked up the remote turn on wire for the amp to the power antenna wire (solid blue). Hook up the remote turn on wire for the amp to the blue wire with white stripe. The power antenna only provides power when the deck is in tuner mode for the power antenna to be extended, intuitively, and cuts power in any other mode, because certainly it's only needed for AM/FM reception.

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