Would this be ok?

[jujumantb 10+ year member]

Honestly ive never seen a performance difference with insulation or w/o but personally i think w/o would be best since it actually doesnt ake up space and that whats a sub requires air space filling the box with cotton would actually lower the amoutn of needed air space.

polyfill (or cottony material) makes the box "feel" bigger to the sub. You could try it with and without to see what you like best.

 

[yamaha326 10+ year member]

lol, thanks man,. the only thing that makes it look alittle bad is all the caulk i used. i didnt want n e leaks, lmfao.but yeah try somethin like that, ull gain a few db's for sure and its pretty easy. just have someone help u wit the length of the ports. tune it to about 35hz for daily. and if u wanna do spl just switch the boxes or make a port plug.

imo....looks doesent matter its how well the box is built...............