I love open baffle speakers. All of the speakers I would own are open baffle and I have been using nothing but since 1978. Having said this open baffle or dipoles subwoofers is a silly notion even from a DIY perspective. The way you control bass dispersion into a room is by careful placement against walls and into corners using multiple drivers.
In 1982 or so I built dipole subwoofers for my Acoustats falling for the reasoning that they would be easier to match up with dipole speakers. The experiment lasted 6 months and was a total and complete failure as far as real low bass was concerned.
In 1982 or so I built dipole subwoofers for my Acoustats falling for the reasoning that they would be easier to match up with dipole speakers. The experiment lasted 6 months and was a total and complete failure as far as real low bass was concerned.