So a couple of weeks ago I asked my wife... "honey can I build you a new end table?" she said yes and as I walked away I mumbled "there's going to be a 12" subwoofer on the bottom" Well it's done and it she actually likes!!!! I opted for a square top. It's 28 1/2" high using a 24" dia tube. I used winlSD and Sonotube construction kit porograms to design it. I will be testing it this coming week. when the kids are at school. I'll post some of pics soon. Thanks for all the threads that I have read on this forum concerning Sonotubes. It helped me decided to go DIY. Mark B.