I first used these in a DML/ribbon monstrosity that doubled as the base that held the panels up (eventually being replaced by the classic series subwoofer kit that i smashed a DSP amp in). The box was entirely too small (0.3 ft3 i think?) and it was sealed, i still had to tame a bit of the low end. They've since been removed from the cabinets and delegated to The Shelf but i've contemplated some monkey coffins or something.
I kinda miss those panels...
