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  #1  
Old 08-12-2008, 10:27 AM
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Default For all you sub builders out there....

Ive been dorkin around with car audio for about 6 years now and got serious with it the last 3 years but one thing I have never even tried to do is to build a subwoofer. So for all of you that build your own subwoofers out there. Is there a software or book or website that is especially helpful in trying to learn this technique or how did you learn how to do it? Thanks guys
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Old 08-12-2008, 10:32 AM
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Default Re: For all you sub builders out there....

Try and get a hold of Terra he is currently building his own and is making a batch of I believe 50 or so. Otherwise Im sure Aaron will have some help for you as well
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Old 08-12-2008, 10:32 AM
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Default Re: For all you sub builders out there....

I may be wrong but I think either SPL Guru or BumpinBuick has built their own. If not I know someone posted something about building there own. A few members on here have used build houses but I think you are talking total DIY, right?

Ediit, I guess it wasn't bumpin buick,
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Old 08-12-2008, 11:11 AM
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Default Re: For all you sub builders out there....

I learned by doing my 1st recone on my own.

Making sure the spider sits flush on the landing, along with the surround sitting clush on inner edge of basket..

I use IC 2000 CA glue, and it hasnt faile me yet!

For a shim, I will build up the inner gap with construction paper, or something thick like that until i can barely slide it up and down between the pole piece and coil....
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Old 08-12-2008, 11:22 AM
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Default Re: For all you sub builders out there....

I have done several recones including custom one of a kinds but I have never built an entire sub from scratch I dont have the magnetizing machines or any of the other crazy expensive equipment.
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Old 08-12-2008, 11:23 AM
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Default Re: For all you sub builders out there....

Well unless you have a magnatizer, you couldnt build one yourself...

Some recones come w cone and coil not yet attached as one.. Thats can be tricky, because if you glue it too low, its gonna bottom out, too high, and it gets out of range.....
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Old 08-12-2008, 01:53 PM
 
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Default Re: For all you sub builders out there....

so would it be possible to make an electro-magnet woofer?
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Old 08-12-2008, 01:56 PM
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Default Re: For all you sub builders out there....

A basic speaker is built around an electromagnet, a metal cylinder with a wire coiled around it. The electromagnet is surrounded by a permanent natural magnet. When you send an electrical current through the electromagnet, it becomes magnetized and acts like a natural magnet, with a north pole and a south pole. The coiled wire in the electromagnet is connected to the (+) speaker wire on one end and the (-) speaker wire on the other end. The audio amplifier is constantly changing the direction of the current so that the orientation of the poles keeps switching.

Changing the orientation of the poles shifts the attraction between the electromagnet and the surrounding natural magnet. This causes the electromagnet to move back and forth. As the electromagnet moves, it pushes and pulls a speaker cone, which rapidly pushes out air and then pulls back in. This movement of air particles produces the sounds we hear. (For more information, see How Speakers Work.)

An audio signal, then, is just a fluctuating electrical current. When the current fluctuates one way, the speaker cone moves in; when it fluctuates the other way, the cone moves out. This signal can be represented as an oscillating wave. The particular sound produced depends on how rapidly and how far the cone moves, which is dictated by the fluctuation pattern in the electrical current.

In a surround-sound setup, the signal for the center channel is recorded on both the A stream and the B stream. The center signals on both streams are identical in amplitude and frequency, and they are synchronized exactly.

Some interesting reading
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Old 08-12-2008, 02:32 PM
 
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Default Re: For all you sub builders out there....

Never really understood how they worked... How does a speaker make sounds like voices, notes, etc. by simply moving in and out? Or does it just amplify the signal sound? I never really thought about how they actually WORKED. I just accepted that they did
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Old 08-17-2008, 03:04 PM
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Default Re: For all you sub builders out there....

Well ive been lookin up a lot of places on the and check out this link i found on how a sub is built its pretty cool.

http://www.metacafe.com/watch/427949...fers_are_made/
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