I have 2 infinity kappa perfects 12.1 and the tech sheet says to line the enclosure with a 1" thick sheet of polyfil, i was wondering if i should do this and would it make any difference if i used poly and if i choose not to.
If I remember correctly, the poly fill, for lack of a better explination, will "fool" the driver into thinking it's in a larger enclosure and will held reduce standing waves. So, I say use it.