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dual end sealed box for sub


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whiterob 
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Posted: November 17, 2009 at 10:16 PM / IP Logged  
comfy_shoes wrote:
what if I used a diaphragm at the one end?
Using a diaphragm or something similar would not be any improvement in sound over a sub itself. Your sub is going to make sound from the movement of the cone. If you put a diaphragm at the end it will also make sound from the movement of it. So all you would be doing is having your sub drive a diaphragm. There would not be anything to gain it would just be a transfer of energy from the sub to the diaphragm. Since you would also have a loss of energy from various objects the output would actually be less. So I don't see any reason of doing this.
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 18, 2009 at 8:21 AM / IP Logged  

comfy_shoes wrote:
what if I used a diaphram at the one end?

That would create a bandpass enclosure.

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i am an idiot 
Platinum - Posts: 13,693
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Posted: November 18, 2009 at 8:25 AM / IP Logged  

I don't think that would be a bandpass.  It would just be a passive radiator powered by a woofer without the benefits of the woofer.   The radiator would make sound because the woofer is making it move.  But wasting the energy that the woofer would normally produce.

EDIT:  I could have saved a lot of typing had I read Whiterob's post before I typed it.    So in short, What WhiteRob said.

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