Question about Jl Audio 500/1 Car Audio Amplifier

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500/1 turns on and off at high volumes

I have a jl 500/1 that was working great, then all of a sudden it has started to turn off and on at high volumes. its fine at low volumes. any ideas?

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Check the independence (ohm) level of your subs and make sure your not into and unsupported ohm level for your amp.

Posted on Nov 14, 2007

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This is a power handling problem, try to see if u have good power supply, a higher current may be needed. try to look for the impedance of your speaker, low impedance would load the amplifier that would cause on and off specially if it has overload protection.

Posted on May 16, 2007

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Adjust your "input sensitivity" on the amplifier, turn it down. This feature is specifically for the prevention of clipping and higher sound quality.

Posted on May 16, 2007

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Make sure that you are using the right Guage wire for that installation. I had the same problem with another amp. I changed both, power & ground wires to 4 Guage and it worked fine after that. maybe that would work for you.

Posted on Oct 03, 2006

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What happened right before it stopped working?

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just a tad is all that it takes to throw it in protect mode so check the gain and the cross over and make sure they are set at a decent level and see if that works a little bit

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JL Amplifier 500 1 shuts off after i put the music up a bit. at low volume levels it's ok. But when i put the volume up it will turn off. Have had the same setup and setting on the amplifier for 1yr. just...


Check the wires going to the amp for any corrosion on the terminals and ground.

. Kind of like when someone squeezes a garden hose2_bing.gif when your trying to use it. That would be the high volume, starving the amplifier. The capacitor stores power in it to power the amp at high volume. 2 farads would probably be bulletproof on a single amplifier system, but 1 farad should work well enough. Or seek help from an expert on exactly what size capacitor you should use. If you find yourself saying: My amp cuts out.

If this assisted in solving your problem, please take the time to rate it. Thank you.

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Feb 24, 2009 | Jl Audio 500/1 Car Audio Amplifier

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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

Amp not functioning right


Check the wires for a lose connection or corrosion. You may need a capacitor.

Basically, at low power the amplifier is not asking for a lot of power from the electrical system to power your sub woofer. For lack of a better term and probably the best way to explain it is. It uses up all the power in the wires leading to it at a high volume, and has to wait for more. Kind of like when someone squeezes a garden hose2_bing.gif when your trying to use it. That would be the high volume, starving the amplifier. The capacitor stores power in it to power the amp at high volume. 2 farads would probably be bulletproof on a single amplifier system, but 1 farad should work well enough. Or seek help from an expert on exactly what size capacitor you should use. If you find yourself saying: My amp cuts out.

If this assisted in solving your problem, please take the time to rate it. Thank you.

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There should be a small switch someware on the amp marked VOX or normal. I bet its on vox. if there is no switch then theres a jumper inside the unit to put it into a vox state. Vox Is when audio is at the input the amp goes on and when theres no voltage at the input the amp switches off.

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