Question about Jl Audio 500/1 Car Audio Amplifier

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500/1 sub amp stopped working, burnt rubber smell

My jl 500/1 sub amp just stopped working after a few years, all lights are on, if i feel the speakers while the music is up high i feel a very small vibration out of the subs, i smell a little burnt smell almost like rubber, i opened it up and i noticed a little black inside one of the 7 black clip shaped pieces attached to the inside side wall under which looks like white lithium grease(located on the opposite side where the wires connect). Im guessing this is the problem, any ideas where i should go or what i should do?

Posted by jrok8166 on

  • jrok8166 Aug 06, 2008

    hey thanks man i really appreciate you taking the time to respond, i just took it to a dealer and they sent it out to jl because there is no place near by that wanted to do it.

    Good looks
    J


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It sounds like the power supply failed. Generally when the supply fails in that amp, you have to replace all 8 of the power supply FETs and all 8 of the 47 ohm surface mount resistors. Many times, the supply fails because one or two of the output transistors have failed.

If you want to have JL repair it, you MUST go through an authorized JL dealer.

If you have a good local repair shop, they should be able to repair it.

Let me know if you have any other questions.

Posted on Aug 06, 2008

  • 1 more comment 
  • whthonk Nov 15, 2010

    How much did JL charge you to fix this? My 500/1 just did this exactly!

  • Gilbert
    Gilbert Sep 15, 2014

    what is the exact part number of the FET transistors?

  • Jordan Honeyman Feb 16, 2019

    I have a jl 500 1 ive replaced everything but the 47 ohm surface mount resistors. I ordered them but were to small. can you give me the size or package style that will fit would be much appreciated.

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