Question about Jl Audio 12W7 Car Subwoofer

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I have a 12W7 jl sub with no enclosure or amp.

And i want to get the best and loudest sound possible.. what is the best way to do this and how much is it going to cost me

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Hello cdoran93,

Well, "best" and "loudest" are mutually exclusive. You can configure for one or the other, but not both at the same time.

The best (most accurate) bass is produced from a sealed enclosure, while the loudest (highest spl) is produced from a properly tuned ported enclosure. The recommended sealed box volume is 1.375 Cu.Ft. Ported is 1.75 Cu.Ft. For a ported enclosure, you need to decide what frequency to tune it for and then look at the JL specifications to the size of the port.

www.crutchfield.com has both types of enclosures at prices starting around $70.

Hope this helps.

Posted on May 11, 2009

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My 12w7 has like a springing sound inside it, what is it?


Blown voice coil,,,,it was connected to a JL AUDIO amp correct? w7`s can ONLY be powered by JL amps due to ohm load.Advice buy a better quality sub,w7 is over-rated

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If your sub isn't loud enough you may want to look into a few things;

1. What type of amp you're using and its output rating
2. The gauge of your power, ground, and speaker wiring
3. The condition and type of enclosure you are using
4. Check to make sure the speaker cables don't touch, because this can cause it to ground itself out and produce little to no sound.
5. Check the RCA connections and make sure they are in order

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Possibly the voltage spike/surge destroyed your subs. I am surprised you didn't lose your amp as well.

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1 Answer

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Anytime you get a popping noise from your speakers, it usually has to do with a ground problem. Try tracing all your grounds to make sure your well connected, especially with this sub and amp combo. If the connections are secure, you might try running the ground(s) somewhere else, the frame of the vehicle being the best of course. Hope this helps and good luck!

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1 Answer

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My full time job is designing and building sub enclosures. So you are in luck.
Anyway you don't want deck speakers and amp for more bass and adding a battery doesn't help unless you already have power problems. Adding an amp and a sub would help but can be expensive. My main recommendation would be to change the box your sub is in, designing it for your vehicle. If you are in need of bass that is crazy loud, then you would be adding subs and amps. Your amp can drive a bunch of subs if you want and it would probably be more economical to just add a sub or three. Shoot me an Email @ dynami28@charter.net if you need specifications on adding such improvements.
-Dynami

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