Perhaps we're splitting hairs here Steve.

If your point is that absorption is not desirable at mid to high frequencies (in a hi-fi context) rather diffusion is preferable and bookshelves are as ââ'¬Å"effective as anything elseââ'¬Â then I'm in agreement ââ'¬â€œ see my post at the top of this page.

Incidentally have you tried any of the Fostex full-range drivers and how do they compare to the Bandor units? I've been toying with idea of building some open baffle full-range speakers (without too much expenditure) but need to do a little more research first.