I am wondering why those threads I do see about DIY subwoofers focus almost exclusively on box-type enclosures and not cylinder-type enclosures. Could this simply be a case of not looking in the right place for DIY cylinder subwoofers? To me, it seems like a cylinder enclosure would be the easiest, albeit not the prettiest, approach to building a DIY subwoofer. One could find cylinders 'tubes' at their local home improvement stores and builder supply houses. Drivers designed for subwoofer applications are abound. And an external amplifier could make the necessity of plate-style mounted amplification not a problem. Still, I wonder about this. Edit: I originally posted this in that other forum. it got 23 views in a matter of 5 hours. I think there may be some interest in the topic, and this prompted me to mirror-post this on HTF. BTW, I thought it was amusing that SVS is selling the ART 351 EQ for $179 when it can be had in any Guitar Center for $99. If this kind of margin is built into a product they sell and don't build I can only wonder about their subs' margins.