Checkout the Sept issue of AudioXpress magaine. HTF own JonMarsh (aka Jon Mark Hancock) has published the first part of his 3 part article on designing "An Unorthodox Two-Way" loudspeaker. A picture of the completed design is shown in the lower right hand corner of this cover If anyone...
HTF's very own Jon Marsh (aka Hancock) has won top prize in the ClioWin Grand-Prix Design contest for his X-1 Slamm Klones.
Not sure, but this might be the holy grail for bass heads. List is around $500, so should be reasonable given the usual pro audio discounts. It's brand new so availablity is probably limited.
Multiple Parametric Filters, assignable anywhere...