it was an alpine i think 12". it really did pop out severally. And i got nervous and lowered the volume. i've never seen a sub pop out as much as that one did.
5 inches eh? I hope you dont overmeasure everything like that haha, anyway if you didnt hear any knockin, them maybe it should be "popping out 5 inches"
♠ Mateo ♠
80 pounds of Titanium
Proud Member of Team Wolfpack Audio
either the sub was messed up or you have an extereme problem with gustimating measurements. :P i don't belive alpine makes a sub with 5" of one way xmax...i don't think..