i'd say thats pushing it m8, from listening to other people on forums they say about 10-20% but nothing beats PROPER volume. Ive tried the stuff, personally didnt do much for me, Ive tried my 12's in 1.7cuft, 1.95cuft and 1.25cuft (1.25 sounding the best BUT larger than factory recs). The only boxes i could get in the boot with the setup i wanted was 0.7cuft and No amount of polyfill or magnet out and polyfill could get the the nice sound of 1.25 boxes.

ed technical reckon i can use polyfill to make my box 35% bigger

Corb Polyfil wont acount for THAT much difference in volume m8 (50%)! Maybe mount the sub magnet outwards with polyfil perhaps?

yes i meant it needs a percific amount of air, I mean look at box design shapes, from wedge to normal square, also bandpass and all of these, they're all different shapes if u know wot i mean and can also be different sizes but still have the same air.

and if you want your sub in a REALLY small box (0.5 cubic feet) and it needs 1 cubic foot, you can use polyfill inside the box to make the sub think its in a bigger box!

some subs need port some dont when you get your sub it will tell you if it needs a port or not

yes the box around the magnet has to be a certain size but your overall install can be how you like!

Hmmmm, do u mean ,it has to have a specific amount of air in and can be any shape.


Wot about air holes , why would it matter if u had an air intake?

am confused now big time:lol:

are we talking size or shape, I was refuring to shape with size?
no I've confused myself.

no this is wrong, the enclosure can be any size but needs ave the right volume of air...if that makes sense, look at installs in mags at car shows, ull see sum crazy installs.

yes a specific size! when you buy a subwoofer it should tell you what size box you need!

can u make the sub box any size u want , do u need to add air-holes or what ????? as i think i read somewhere it had to be a specific size!