Maybe I should get 3 pieces of this instead?
On several Dutch forums they say it works pretty good. But I dunno what your opinion is on them.
I will be using it only for the inside-rear part (3 pieces; behind each subwoofer 1).
//Edit
Or should I do all the sides in the enclosure? My enclosure is about 84 liters including 4.5 liters for bracing or 2.97 cu.ft.
I will be powering each of the 3 Mags with 800W RMS approx.