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Old 09-28-2013, 08:12 AM   #1
Drives: 2011 2SS
Join Date: Aug 2012
Location: Atlanta, GA
Posts: 34
Sub Project - Polyfill Filling

I’m planning for a Sub project in the next several weeks

My question should I fill the box with Polyfill Filling ?
reading over the net it's 50%/50% on Yes and No so any experience feedback is great
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Old 09-28-2013, 08:59 AM   #2
bee sting

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Drives: 1997 30th Ann. Z28 & 2010 2LT RS
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Location: Suffolk Virginia
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I called J L audio and they said yes.. went to Wal-Mart and bought a bag for my 10" ******** single trunk box.
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Old 09-28-2013, 02:38 PM   #3
I run 2 catch cans...
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Drives: 2012 1LT SIM Auto
Join Date: Oct 2011
Location: OR there
Posts: 986
I go overkill on my sealed box linings. I use Sonic Barrier foam as a base in multiple layers with overlapping seams:

then finish up with Acousta-Stuff:

Both my home sub box (15" woofer), and car sub box (12" woofer) have this treatment. I only hear the music - no box vibrations. Each sub gets more than 600 watts RMS.
Overkill tuned • Air Scoop • CAI • VMAX PTB • JacFab Extendolator • SOLO Hi-Flo Cats and Cat-Back Exhaust
View my top 3 LFX performance mods and more:
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Old 09-28-2013, 07:26 PM   #4

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Drives: 2011 Synergy Green Camaro LT
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If your box is low in airspace then yes. If you have sufficient amount of air space then no. Its made to slow down the acoustic wave which can result in deeper tighter bass. Ive lined the inside of boxes with foam and dampener before and saw a db loss and airflow loss on meters. They absorb the waves.
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