Thanks for the info. These are the speakers.
http://www.ruark.net/products/Contemporary/etude.shtml
How much would a high quality, high pass filter cost? Would I connect it to the speaker cable to between the LF terminals and poweramp? Why's it called it a high pass filter- I would think calling it a Low Pass filter would make more sense?
I'm sending the speakers full-range (stereo integrated amp) passively bi-amped.
I assume if you use ported standmount/bookshelf speakers at normal listening levels then you wouldn't need one of these?- you would only need one of you notice parping/distortion/port noise.