Hello From Denmark
follow this treat with great interest ..because i have used something like this.on my LS9
my first digital crossover was Groundsound 2 ways,,,where i used a Groundsound amp for the bass and my Gryphon Encore amp for the top...it sound really good,,,only problem was ,that my Gryphon amp sounded better than than the Groundsound in all aspect,,,so i could not get the best sound out off the speaker..
next step was to change to passive again,,and upgrade some off the component in the filter,,,
for the bass i use a Jantzhen c-coil with very low resistance ---give me a very dynamic bass
for the neo i change to mundorf supreme caps,,and cross coil all over----all parts with the same value as in the original
Then i use Jriver on my pc ,,and go from usb to my DDdac pcm1794..where i can play hi.res music
the Jriver prog is very nice ,,it have also the same functionality as my former Groundsound digital filter,,,,like room correction and so on
The biggest problem .in my opinion ,is ,the need for to amp in the same quality ,,,remember that the LS9 crossover in a place, where it is important, that the amp is equal good
another important things in digital filter and dacs ,,is the output stage,,,no Opamp is good enough,,,compare to a cap, or trafo, or a good tube output
for now i must say, the sound in LS9 is very very good.....
Best Regards Bjarne