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
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Re: 500/1 sub amp stopped working, burnt rubber smell
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.
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you have your sub wired incorrectly. your amp shouldn't get hot unless you're settings are too high or your'e sending too small of an ohm load to the amp. this would cause it to heat up and will fry your amp.
just go through ur connections man one by one ull find the prob soon.....check teminals on battery...power line to amp ....all fuses within prob area and obviously make sure u have a good ground.....really impotant.....ground is the most neglected thing people do from my experience bein a audio tech oh and if that isnt it check ur subs....stick a 9v batt on the back pos n neg of each sub n c if they pop in r out this will determine if ur subz r blown
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
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.
Assuming that you've confirmed that the speaker is in good working order and that the wiring isn't shorted in any way...
There are separate power supplies for the high and low amplifiers. It's possible that the one for the sub output has failed. If that's the case, the output transistors probably failed and that's what damaged the supply.
Generally, I'm willing to help people repair their amps but this is a large, complex amplifier and it should be repaired by a qualified technician.