well you really have to bend over to see the amp under the seat sooo to me that is stealth lol cant see speakers either until i start my fiberglass enclosure in the door pods

pollyfill eats up inner volume and raises the tuning..it also deadens the
interior of the enclosure and it also traps heat

the only time I use pollyfill is to stuff a weird shaped "sealed" fiberglass pod
to adjust the tuning/inner volume

took out the polyfill this week and well its louder lol

while i've seen papers showing how poly affects the system in a sealed box, i don't remember anything about poly in ported box.
any numbers of ported box and poly, guys? :)

i dont know but from massive audio they said 1.5cf without polyfill sealed and 2.0cf with 80% polyfill ported so i tryed it and well the bass is tighter but less output than without poly

read this article, it sheds some light on polyfill.

Ultimate Polyfill Subwoofer Enclosure Resource [audiojunkies]

thanks veeman finally a site that explains a bit more lol

hey trevor that what I thought too, but anyone I ever talked too about it, say it a good way to increase box size without actually increasing it... Read article about it in this thread.... I dunno I prob never tried it unless I had termlab and see numbers differences... impedence rises and what ever else needed:cheeky4:

It does the opposite: lowers the effective Qtc and the resonance frequency.

Could you expand on that a bit? Typically people use the term "deaden" to imply that the resonant frequency of a particular object has been lowered by whatever material has been added to the object. It can, however, absorb sound at higher frequencies, typically well outside those of a subwoofer (even outside of the harmonics encountered within typical subwoofer bandwidth).

Nice install either way. I like the ports firing under the seat, looks good. Keep up the good work. Nice and clean.