Thiel Owners

With dsp any xo can be linearized with zero phase at the xo area though with ringing often hidden in the noise level.

Rules - my comment addresses the presumption among many that zero or linear phase response is without problems. I admit that its problems are indeed minor and in the real world may be a best choice solution. For your enjoyment here's a very brief synopsis of the elements including the psychoacoustic reference to pre-ringing being more disturbing than post. I will add that today's DSP execution of all filter types with optimization is far better than my experience a decade and more ago. Enjoy. 
https://ccrma.stanford.edu/~jos/filters/Linear_Phase_Really_Ideal.html

Beetlemania 

It's about the fastest (motion feedback) subwoofer money can buy, and I will also use it for AV.

Happy Friday! All

jafant -

Yes, Rob's quote was about two months ago.