Just curious here, wanting to make sure I don't neglect any valid options. I'm looking for a speaker/enclosure design that can cover the range from ~60Hz to ~180Hz. Simple to ask hard to answer question: what would the usable frequency range of a DPL 12 be? I'm having difficulty figuring out the high frequency extension of different drivers, and with dipole now I don't even know how to model the low end. More difficult to ask but probably easier to answer question: what are the baffle requirements for appropriate dipole mounting? Are those highly dependant on the room, and freuqency response desired, or is it more dependant only on the driver chosen?