I have a sub that I can only put in a box that is a bit too small. I was going to do a feedback system, but came across the info for a Linkwitz Transform. Seems pretty much dead on with what I want to accomplish. Working with the value a bit, it seems extremely touchy! Just a small shift in box volume throws everything off. Has anyone had experience setting these circuits up? Currently it seems like the best way to do it is going to be to build the speaker box, and test the woofers actual in box frequency response. Take the results and determine the Q and Fb to build the Linkwitz transform. Is this really the best way?