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Okay lets go step by step. First check and sure you have battery voltage and twelve volt turn on on the remote term. of your amp. Be sure u have a ground also. Next take your speaker leads disconnect them and pop them with a battery, and make sure it pops. I(f that all passes you need to make sure your amp is getting an input signal because you could have a bad rca cable.
Did you check the fuse(s) on the amp itself ?
One or more of those fuses are for protection on the output side of your amp.
What about the 12 volt power from your battery, have you checked for 12 volts present at the input power side of your amp?
Don't forget that you need just as good of a ground as you need power supply!!!!!
Good luck !
silly as it sounds, you may want to check your EQ settings on your headunit. Things like sub volume, SLA, loudness and balance. When they replaced your battery, those old settings were lost.
well you need to check to see if nt no shottage with the amp and also check if the fuse is not to low amp 20,,,, 25 if not put the amp in a separet 12 volt battery
You have to go through an authorized dealer to get service from JL. Most good repair shops can repair most problems with them.
Before you send it off, confirm that you have good DC voltage at the remote and B+ terminals.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
Make sure that you don't have any strands that would connect the remote lead to the constant +12 volts. Also make sure that your remote lead fromt the radio switches off when you shut the car off. If you don't have an aftermarket radio with a remote turn-on lead, tap into the ignition wire to the radio. Let me know what kind of car you have and I can point you in the right direction to get the right wire. Good luck.
-Andrew Hawkins
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