Hi Bob,

Some may think that the term "Housewrecker" is a joke.  IT'S NOT!

I have built three of them, all 15", over the last four years.  Gave one away, sold one.  I use mine for home theater and not for any serious music listening.

The first one was used in a old farm house and I succeeded in knocking a bunch of plaster down from the ceiling in a closet next to the livingroom.

I now live in a 100 year old all brick home.  The foundation of my home is all brick also.  I have noticed that the morter between the bricks in that foundation below my HT room is disintegrating at a higher rate than normal.

Someone I know has discontinued the use of his very large subwoffer because of the damage to his cement foundation.

To much of a good thing has a stiff price.