myer84

iTrader: (1)

Hey fellas,

I decided this past 4 day weekend to work on my car and start a new design on a box for my trunk. I'm currently running two 12" Phoenix Gold Xenon subs and 1200 watt Xenon amp on a 1 cubic ft per sub sealed enclosure. About two months ago I purchased 4" port tubes so that I can build a ported box. I went to Phoenix Gold's website and got the recommended volume for a ported box for my subs. Each sub needs 2.75 cubic ft. I made measurements in my car and 2.75 square ft would take up a lot of space. I still want to have access to my spare since I do a daily commute of 60 miles back and forth. The most I can build is a 2 cubic ft enclosure per sub to have access to my spare. I been doing some research and came across polyfill and based on what I read this stuff supposively makes the sub think its in a bigger enclosure and helps with bracing the box. I'm not too experienced with this stuff and I wanted to know if anyone can give me some feedback and advise on this.


Thanks in advance

AscendantMax

iTrader: (7)

don't forget to consider the volume of the port as well when trying to calculate the required airspace for each sub.

two cubes would be ok for a ported 12. polyfill won't help brace a box. if anything, try to use some wooden dowels for bracing.

nismos14

iTrader: (56)

You may want to just try a single 12 ported then. Having the pair ported will be difficult to do with having to shrink down the enclosure size.

myer84

iTrader: (1)

Each sub will have its own enclosure. The port diameter is 4" and lenght is 8". The required volume for each sub is 2.75 cubic ft. I could possibly build an enclosure for each sub for about 2.25 sq ft and only have 1/2 a ft less than recommended. So I was wondering if by adding the polyfill it would trick the sub to think that it is actualy in a bigger box than 2.25 sq ft. I guess my main question is how much air space will the polyfill "add" to the box?