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<blockquote data-quote="a4rings" data-source="post: 6745381" data-attributes="member: 620670">Hey guys, the title almost says it all. I recently purchased a custome built sealed fiberglass box for my e92 bmw 335i and i want to know what kind of material to put on the inside of the box. The box was too thin when i first got it so i added like 4 more layers of fiberglass matt and then a nice thick layer of KITTY HAIR so im guessing the 1.2 cubes the box originally was is around 1.1 or 1.0 now. So now i was wondering what would be the best material to put on the inside of the box to make my IDQ-12 v2 sound the best. by sound the best i mean have the tightest, cleanest, most crisp bass. Increased bass wouldnt hurt eitherIve heard of all sorts of stuff like Egg Crate foam, Studio foam ($$$), Fiberglass insulation, Polyfill,&nbsp; etc and i dont know what to do.....I also hear alot of people saying if you put &quot;XX&quot; in the box then it will trick the sub into thinking it is in a larger enclosure? im not sure if i need that?thanks guys, i really appreciate it.</blockquote>

[QUOTE="a4rings, post: 6745381, member: 620670"] Hey guys, the title almost says it all. I recently purchased a custome built sealed fiberglass box for my e92 bmw 335i and i want to know what kind of material to put on the inside of the box. The box was too thin when i first got it so i added like 4 more layers of fiberglass matt and then a nice thick layer of KITTY HAIR so im guessing the 1.2 cubes the box originally was is around 1.1 or 1.0 now. So now i was wondering what would be the best material to put on the inside of the box to make my IDQ-12 v2 sound the best. [B]by sound the best i mean have the tightest, cleanest, most crisp bass.[/B] Increased bass wouldnt hurt either Ive heard of all sorts of stuff like Egg Crate foam, Studio foam ($$$), Fiberglass insulation, Polyfill, etc and i dont know what to do..... I also hear alot of people saying if you put "XX" in the box then it will trick the sub into thinking it is in a larger enclosure? im not sure if i need that? thanks guys, i really appreciate it. [/QUOTE]

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