Question about Jl Audio 12W3 Car Subwoofer

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Sub works but doesn't sound right

My car sub works when i turn up the stereo, and it still vibrates like it is hitting hard but has no sound like it used to. i don't think it is blown though because it doesn't make that rattling sound like when i have blown a sub before?

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Hey been there before u need new rca wires form ur radio to the amp.

Posted on Jan 17, 2009

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You need a low pass crossover set at 80 hz & below. It will stop the music you hear in the sub. Don't expect the feel of a single 10 in a room to be like the same sub in a car. A car fills with pressure & gives the feel you want. A ported box designed to work with your sub will give you 3db or more output than a sealed box.

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Make sure your sub is securely screwed to your box, boot build, whatever you have it sitting in. Remember subs are made to vibrate when working, check your screws are tight.

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First thing when your care is idleing turn you system up and watch your rpms. Is it going all over the place when you turn it up?If so your altenator isn't putting out enough power.Might be able to fix that problem with another fadar cap. You should buy the digital read out for your cap to see how bad its draws power.They have ones that will mount to the top of your fadar cap.You can all so get a bigger altenator.Also check your ground clean it along with other connection batter,both sides of you fuse and any other connection,bass will loose all bolts/screws over time because of the bass,even to sub have had one work its way off in a year once.

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It sounds like the wiring either to the amp or to the subs is put together wrong. This can be because you have them setup in stereo but have the sub on bridge mode or vica versa. This can also be from how you ran the audio input wither from speakers or rca..either wired wrong or the switch for the two options is wrong. Also make sure your gain is turned up. Sound also depends on what kind of box it is in. It HAS to be in a box.

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try hooking up your subwoofers in series. then connecting them bridged to the amplifier. as follows: positive from sub#1 into positive of amplifier left channel.. negative sub#1 into positive sub#2. negative sub#2 into negative amplifier right channel. turn the gain down as this will sound pretty loud.

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I have the same problem TOO!#$#@% Anyone out there?

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