Question about Jl Audio 12W3 Car Subwoofer

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No sound out of subs

I have a factory radio and its connected to a zapco 1000 amp and then two 2 12w3 jl subs its has a spare battery in the back a red top optima its has power to the amp cuz the fan is running on it but no sound from the subs i have checked the rc cables from the head unit to the amp and they look ok but no sound

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  • 12 Answers

Undo all the wires to the amp and the speakers and simply rewire em.

Posted on Feb 26, 2009

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1 Answer

No sound


ok if u have a radio with sub controll make sure its on an make sure that you have the gain bassboost turned up an if it has a crossover switch make that its on

Jul 24, 2010 | Jl Audio 1000/1 Car Audio Amplifier

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If the sub is new, they need to be broken in.

All sub woofers need a break in period of about 5 to 6 hours at medium volume.
The reason is because the glue needs to be cured. This is done by the heat from working.

If you are giving it too much volume too soon, you are burning the glue.

Back off the subs and only play them at medium volume for about a week.

Nov 22, 2009 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Power pyramid subs smoking i think the jl 1000/1 is tuned wrong..


If the sub is new, they need to be broken in.

All sub woofers need a break in period of about 5 to 6 hours at medium volume.
The reason is because the glue needs to be cured. This is done by the heat from working.

If you are giving it too much volume too soon, you are burning the glue.

Back off the subs and only play them at medium volume for about a week.

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You should definitely upgrade the power wire to the sub amp to 4 gauge -absolutely your choking your amp its starving for current-poor thing is starving !!!!!!!

Apr 16, 2009 | Jl Audio 1000/1 Car Audio Amplifier

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These subwoofers are dual 4 ohm voicecoils.

Parallel wiring the 2 voicecoils would net a 2 ohm mono load.

Connect both + on the sub to the + on the amp.
Connect both - on the sub to the - on the amp.

Many professionals simply jumper the 2 + and 2- on the sub.... then run 1 set of wires from one of the terminals to the amplifier.


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IVE HAD 2 JL 1000/1S DO THIS TO ME EACH TIME ITS TURNED OUT TO BE A SHORT IN THE RCA IMPUT BUT ALSO CHECK YOUR RCA CABLES AND THE SUB INPUT ON YOUR HEADUNIT

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If I'm not mistaken, the blue light is the low voltage indicator. You need to confirm that the voltage ON THE POWER SUPPLY TERMINALS of the amp never drops below 11 volts. If it does, the amp will shut off. It's possible that you have a bad connection or even a defective fuse that's causing the problem.

JL recommends a 100 amp fuse for the amp. If you use a fuse that's too large and something goes wrong, the amp may be very severely damaged (possibly beyond repair).

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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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This sounds odd, but try putting your subs out of phase from the mains. Just see if it changes anything.

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my amp did same shit, its the rca cabbles, check them out at the back of the head unit. the input jack is probably bad on the head unit

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