Fiberglass box start to finish
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=68814
Printed Date: April 29, 2024 at 4:57 PM
Topic: Fiberglass box start to finish
Posted By: jw007
Subject: Fiberglass box start to finish
Date Posted: December 20, 2005 at 4:14 PM
Here are some photos of my speaker box project. The initial skeleton: 
Strectched the Fleece 
Looks like I forgot to photo the fiberglass matte. I used 3 layers of chop matte. Here's the Bondo... 
After lots of sanding and layers of bondo... 
Paint.... That's right...Pink. It's for my girlfriend... 
Finished Finally..
Replies:
Posted By: pajokijr
Date Posted: December 20, 2005 at 5:28 PM
ahhh to p2's and whats that a 3001???nice set up,clean box...hey my girl would love to have something like that in her car..i actually like that design alot man.
Posted By: Teamrf
Date Posted: December 20, 2005 at 6:22 PM
Good job....how does it sound?
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~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.
Posted By: 5150azn
Date Posted: December 20, 2005 at 7:17 PM
making it look so easy!!!
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Tell the Snap-On guy I'm not here!
Posted By: darreng
Date Posted: December 20, 2005 at 9:47 PM
lucky girl,
Posted By: jlord16
Date Posted: December 21, 2005 at 12:59 AM
nice setup, looks good
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Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*
Posted By: jw007
Date Posted: December 21, 2005 at 1:40 PM
Thanks for the great replies. I haven't actually heard it yet. I had to rush to get it completed. I'm going out of town, so I have to do Xmas tonight...so I had to rush. I still plan to use packing peanuts to figure out how far off the .66 cubes I need and possibly make some adjustments internally using polyfill or similar to lower the air psace. I think I'm pretty close already. I am using a P2002 rockford amp. The speakers are 8 ohms paralleled and the amp is bridged mono giving me 200 watts. It should rock !!! Jason
Posted By: dragon51
Date Posted: December 22, 2005 at 8:06 PM
Um, adding polyfill will increase the air space not take away form it. It makes the speaker think it in a larger box. I would try useing some scrap MDF then you can adjust for the needed air space. And don't for get to also take into accout the displacement of the speaker it' self. So you might already be right in the ball park. Good job on the box though
Posted By: darreng
Date Posted: December 23, 2005 at 10:02 PM
dragon51 wrote:
Um, adding polyfill will increase the air space not take away form it.
what!? it displaces air, therefore decreases airspace.
Posted By: jlord16
Date Posted: December 23, 2005 at 10:37 PM
polyfill does displace air but, it simulates a larger airspace which happens to be more then its displacement, i dont know the science resoning but i know that adding polyfill makes the sub sound like its in a bigger enclosure, wodden supports or MDF make the volume smaller
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Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*
Posted By: HottAccord
Date Posted: December 31, 2005 at 12:30 AM
Nice job! My girl wouldnt appreciate a piece like that!  ------------- Im a fiberglass whore!!
Posted By: dstang24
Date Posted: January 07, 2006 at 12:05 AM
I believe the science behind the polyfil is this: The speed of the sound waves is decreased when polyfil is added. Therefore there is less cancellation or standing waves within the enclosure. The time it takes for the sound waves to reflect inside the enclosure is then greater, which is exactly what would happen in a larger box. Filler like this is used in the transmission line enclosures. https://www.caraudiomag.com/technical/0206cae_boxbasics/ <<<Lower half of the article.
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