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<blockquote data-quote="truckramrod" data-source="post: 2276152" data-attributes="member: 570869">Heres the situation:&nbsp; I built an enclosure in my friends car and the subs sound fine without polyfil and wired to the amp @ 4 ohms, but today I pulled the subs out and rewired them to run the amp at 1 ohm. and I added about 30 oz (approx 1.8lbs of loose polyfil&nbsp; with a mesh over the port opening) per side of the enclosure, and now the bass doesn&#039;t seem to be as deep and there doesn&#039;t seem to be a lot of air movement in the port as compared to the same setup with no polyfil.I don&#039;t understand what the problem is, I&#039;ve read that 1.25 lbs/ft3 worked well in a 1.4 ft3 box, however as box volume increase then the effect decreases.So basically with 1.8lbs in 2.5 ft3 per side that would calculate out to about .75 lb per ft.With that The inside of the box was pretty well stuffed with fibers, so should I still have and open path through the polyfil to the port opening.Im just irritated and disappointed to go from maybe 125 watts a sub in the ported enclosure built to the lower size of the woofers specs, to almost 3 times more power per sub as well as what should be a somewhat larger, more efficient and slightly lower tuned enclsoure.It sounds silly but I havent done much testing with the&nbsp; setup as it keeps popping the 60 A agu main fuses, we will be upgrading to an anl fuse holder with a 100 or 125 A fuse tomorrow.BTW the subs are Phoenix Gold Xenon 12d4s powered by a Soundstream PIC1.900d in a 5 cube box firing forward through the folded down seats in an 03 Mustaing.So any advice, suggestions, questions, similiar experiences ETC... would be very appreciated.</blockquote>

[QUOTE="truckramrod, post: 2276152, member: 570869"] Heres the situation: I built an enclosure in my friends car and the subs sound fine without polyfil and wired to the amp @ 4 ohms, but today I pulled the subs out and rewired them to run the amp at 1 ohm. and I added about 30 oz (approx 1.8lbs of loose polyfil with a mesh over the port opening) per side of the enclosure, and now the bass doesn't seem to be as deep and there doesn't seem to be a lot of air movement in the port as compared to the same setup with no polyfil. I don't understand what the problem is, I've read that 1.25 lbs/ft3 worked well in a 1.4 ft3 box, however as box volume increase then the effect decreases. So basically with 1.8lbs in 2.5 ft3 per side that would calculate out to about .75 lb per ft. With that The inside of the box was pretty well stuffed with fibers, so should I still have and open path through the polyfil to the port opening. Im just irritated and disappointed to go from maybe 125 watts a sub in the ported enclosure built to the lower size of the woofers specs, to almost 3 times more power per sub as well as what should be a somewhat larger, more efficient and slightly lower tuned enclsoure. It sounds silly but I havent done much testing with the setup as it keeps popping the 60 A agu main fuses, we will be upgrading to an anl fuse holder with a 100 or 125 A fuse tomorrow. BTW the subs are Phoenix Gold Xenon 12d4s powered by a Soundstream PIC1.900d in a 5 cube box firing forward through the folded down seats in an 03 Mustaing. So any advice, suggestions, questions, similiar experiences ETC... would be very appreciated. [/QUOTE]

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