Last night I went to my local audio store to check out the revel b15 sub. I listen to it for about and hour or so on a pva 2 with some revel m20s. I was so shocked at how good this sub sounded I had to take it home for a demo (after more or less ordering one!!!). When looking at the sub in the store the sales person pointed out that it had tape around the speaker grill to make the grill thicker. It ends up the tape is on there to prevent the grill from shooting off!! So when I got it home I took off the tape and sure enough it shot that bad boy a good 3 feet!! If you have not test this thing in your home you owe it to yourself to do so.