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» Termpro Audio Forum » Installer's Corner » Advanced Topics » This info blow my mind away...improve your spl by moving your box!

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Author Topic: This info blow my mind away...improve your spl by moving your box!
Mr C
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I tried this and found I got a noticable SPL increase, it blew my mind, never thought it would turn out this way but it makes sense.
Check it out
http://www.teamrocs.com/technical/pages/aiming.htm [Big Grin]
Posts: 36 | From: South Africa | Registered: Oct 2003  |  IP: Logged | Report this post to a Moderator
toxicbass_1
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thats pretty cool its not often you see people doing this.

its too bad he didnt do a formal write up,only a summary

id like to see his method and results to make the wave diagrams he draws,

it leads to u giving him trust that its correct..

it makes sense and isnt unexpected
but it would prove something if it could be reproduced in another car,and with results and methods

its good [Big Grin]

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http://www.geocities.com/basshornguy
Posts: 503 | From: NZ | Registered: Sep 2003  |  IP: Logged | Report this post to a Moderator
SoundQMitsu
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I don't have any graphs to back up my story, but I found the same results as that guy did. I also found that if I open my trunk while listening to music, the sub distorts pretty easily. I'm guessing that because of the decreased pressure on the outside of the cone it is excurting too far. I have an Image Dynamic IDQ sub and the XMAX is only 13mm. I was worried that maybe the sub was still distorting with the trunk closed but I couldn't hear it. So I hopped inside and closed the trunk. The distortion went away.
Posts: 16 | From: Tacoma, WA | Registered: Apr 2003  |  IP: Logged | Report this post to a Moderator
Pioneer_Phan
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KEWWL

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Changin Everything...
everything will be louder then!
Posts: 565 | From: Ottawa | Registered: Jul 2003  |  IP: Logged | Report this post to a Moderator
Maulkar
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I would just face the box forward and seal it off from the trunk. That way you eleminate the cancelation problems and still have some of your trunk left.

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http://members.sounddomain.com/maulkar

99 Ford Ranger standard cab
Clarion DRX8676z
1 DD Audio 9512
U.S. Amps 4000x
Posts: 981 | From: Houston, Tx | Registered: Sep 2000  |  IP: Logged | Report this post to a Moderator
toxicbass_1
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there is often no way to completely seal off the bootspace.

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http://www.geocities.com/basshornguy
Posts: 503 | From: NZ | Registered: Sep 2003  |  IP: Logged | Report this post to a Moderator
Eli47
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In a word it's called "Wavelength". Freq / speed of sound.
as for sealing off the bootspace(trunk), the only way (in a sedan) is to fire the sub's output through the rear parcel shelf, by ducting the woofer's output, or directly mounting the cabinet to the rear parcel shelf.(sometimes you have to cut, but be sure to re-inforce structural integrity, the metal on the parcel shelf keeps the roof from collapsing in case of roll-over)
firing the subs through the rear of the back seat will not work to get max wavelength.

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E.C. Wuz here
Posts: 1057 | From: Vancouver, British Columbia, Canada 'eh | Registered: May 1999  |  IP: Logged | Report this post to a Moderator
   

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