HSU Research is now shipping its new VTF-3HO flagship subwoofer. It may also be enhanced by the Turbo package, an outboard enclosure linked directly to the main sub to extend the port length. It is said to produce the output of two non-turbo VTF-3HOs. Po Ser Hsu had top of these puppies in the corners of a room about the size of two walk-in closets, and to say that the bass was powerful would be an understatement. It also sounded very deep; don't let anyone tell you that you can't do bass in a small room.—TJN