Civic trunk build... 12's or 15's?

[412 CVX]

that depends on a lot of factors. maybe if said 15 had twice the power going to it. but 2 12's is more cone area, so in theory, if you could fit a proper sized box for 2 12's forward firing into the cabin, you'd be louder.

[jlh2003]

What year civic?

I have a 2006 civic sedan, full trunk setup with 2 12's that gets a lil loud:-)

[KickerKid58]

Yea that's what I am thinking... In the end the basic cone area is king seems to take over. Hey 412, would you think I would just be better off making a solid ported box for the 12's as opposed to trying to fit a 4th order in there?

And its a '99 lx

Edited February 29, 2012 by KickerKid58

[doug118]

Just do a regular ported box. If you want loudest, do subs back and aero port firing towards the drivers side. That's what usually is loudest.

I personally liked having subs and port firing towards the trunk MUCH MUCH better then firing foward sealed off. Never got the chance to fire the port to the side

[jlh2003]

Sealed off firing fwd in my civic I lose 3-4dbs...

With 2 sonic soundlab super sonic x 12's and a sundown saz3500' sealed off it'd barely do a 138,

subs and port back it'd do a mid 143...

Right now it's subs and port fwd not sealed off box all the way to the rear of the trunk as close to the trunk lid with 2 6" aero ports ....that way it'll do a 148...

Look at terry Brock's setup, I got my ideas from him

I've tried port back, port to the side, sealed off and it's loudest firing fwd unsealed off...granted every cars diff but there both civics

Edited March 1, 2012 by jlh2003

[doug118]

Yup I forgot about the box all the way to the back of the trunk. that will work if you have the room to push it far back. build a box and try all different positions and see which one sounds best to your ear. that's all that really matters

[smceachran]

12s

[KickerKid58]

Sealed off firing fwd in my civic I lose 3-4dbs...

With 2 sonic soundlab super sonic x 12's and a sundown saz3500' sealed off it'd barely do a 138,

subs and port back it'd do a mid 143...

Right now it's subs and port fwd not sealed off box all the way to the rear of the trunk as close to the trunk lid with 2 6" aero ports ....that way it'll do a 148...

Look at terry Brock's setup, I got my ideas from him

I've tried port back, port to the side, sealed off and it's loudest firing fwd unsealed off...granted every cars diff but there both civics

Thats crazy how much of a difference that made. Never even thought of that. On a quick side note are there any significant advantages to using areoports over a basic slot port? Is the elimination of port noise one part of it?

[jlh2003]

from working with some of the sundown/Team nemisis guys doing testing and from their previous testing they have noticed about a 1db gain with aero ports vs slot ports.

when doing a design with the box in the rear of the trunk fwd firing you have to think outside the box and kinda imagine the trunk as the 2nd chamber and kinda think of it as a 6th order almost in some ways...What I mean is you have to reinforce the trunk and seal every opening and air leaks like vents or tail light or the notorious honda fender cavities....a trunk box is no good if trunk is weak it self

here's some suggestion's Ill share that I got from Mr Brocks himself

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  silicone around rear light fixtures then dyno mat over that if you have panels otherwise tape over duct or gorilla
  
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    brace your trunk panels with mdf
    
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    wall them side panels in trunk left and right
    double layer your door panels
    
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      foam the insides after you wall off
      
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      http://www.facebook.com/photo.php?fbid=256830504332651&set=a.235426176473084.79249.100000171104106&type=3&theater
      
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      http://www.facebook.com/photo.php?fbid=256832120999156&set=a.235426176473084.79249.100000171104106&type=3&theater
      
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      use the whole trunk as an enclosure too
      
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      so the trunk has to be re-enforced
      
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        http://www.facebook.com/photo.php?fbid=256832117665823&set=a.235426176473084.79249.100000171104106&type=3&theater
        
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        bracing will make the side of trunk walls as flat as possible
        
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        so bass wave won't be too interrupted
        
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          takes a strong bass wave to reach to sensor from all the way back from trunk
          
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          so a good braced re-enforced solid trunk walls willl bounce those bass waves straight out the trunk
          
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          http://www.facebook.com/photo.php?fbid=256832700999098&set=a.235426176473084.79249.100000171104106&type=3&theater
          
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          then you add deadener over it
          
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            it's also crucial to keep amp and batts inside spare tire well too
            
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            thats if they can fit
            
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            it would maximix\ze box design options
            
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            the thing that seperates music from spl designs is port size and box volume
            Just some suggestions I though might benefit you!:-)